A model of the White House sits atop a 60' by 40' foot map, used during a ceremonial rehearsal of concept drill at the D.C. National Guard Armory in Washington, Dec. 14, 2016. This final planning symposium showcased the culmination of months of preparation between military and civilian entities for the 58th Presidential Inauguration.

More than 160 candidates for American citizenship, from more than 40 nations, swear allegiance to the United States of America and become citizens, Nov. 21, 2016, as part of a naturalization ceremony at the U.S. Patent and Trademark Office in Alexandria, Va.

More than 160 candidates for American citizenship, from more than 40 nations, swear allegiance to the United States of America and become citizens, Nov. 21, 2016, as part of a naturalization ceremony at the U.S. Patent and Trademark Office in Alexandria, Va.

Michael Brodsky, a physical scientist at Army Research Laboratory in Adelphi, Md., explains efforts to develop quantum networks. He is one of several researchers within the Army working to find new ways to exploit the most fundamental or "quantum" component of light -- the photon -- to enhance communications, sensing and cryptography, and anything else they can think of.

In the future, defense contractors who want to build unmanned systems for the Army must focus on increased situational awareness, lightening the load on Soldiers and force-protection capabilities, said Vice Chief of Staff of the Army Daniel B. Allyn, Oct. 26.

Capt. Jonathan Janiszewski, 2d Brigade Combat Team, 1st Armored Division, Air Defense Airspace Management cell, explains a portion of the "RAM Warn" system outside the BCT command tent, Oct. 14, 2016, in advance of Army Warfighter Assessment 17.1 at Fort Bliss, Texas.

A 3-D printer manufactures a part inside the "Rapid Fabrication via Additive Manufacturing on the Battlefield" facility, Oct. 14, 2016, at Fort Bliss, Texas. The R-FAB is one of the capabilities and concepts under assessment as part of the first Army Warfighter Assessment.

Chief Warrant Officer 2 Ron A. Billingslea, an allied tradesman with 2d Brigade Combat Team, 1st Armored Division, showcases parts he made on a 3-D printer inside the "Rapid Fabrication via Additive Manufacturing on the Battlefield" facility, Oct. 14, 2016. The R-FAB is one of the capabilities and concepts under assessment as part of the first Army Warfighter Assessment.

At Fort Bliss, Texas, Oct. 14, 2016, one tactical vehicle, with a driver, is followed automatically by another, without input from the passenger behind the wheel. The "leader-follower" vehicle concept is being evaluated during the Army Warfighter Assessment 17.1 at Fort Bliss. In practice, multiple vehicles in a convoy could be controlled by only one vehicle, the lead vehicle, while the follow-on vehicles remain driverless. Without the need for those additional drivers, there would be fewer Soldiers involved in the convoy and less risk of loss of life in the event the convoy is attacked.

Gen. Vincent K. Brooks, commander of U.S. Forces Korea, places a medal around the neck of Korean War veteran William Hartley, Sept. 24, 2016, at the Korean War Memorial in Washington, D.C. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016.

Gen. Vincent K. Brooks, commander of U.S. Forces Korea, places a medal around the neck of Korean War veteran J.D. Bolt, Sept. 24, 2016, at the Korean War Memorial in Washington, D.C. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016.

Gen. Vincent K. Brooks, commander of U.S. Forces Korea, places a medal around the neck of Korean War veteran Ray Fore, Sept. 24, 2016, at the Korean War Memorial in Washington, D.C. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016.

Gen. Vincent K. Brooks, commander of U.S. Forces Korea, places a medal around the neck of Korean War veteran Bill Creed, Sept. 24, 2016, at the Korean War Memorial in Washington, D.C. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016.

Jack Walsh, left, a "guardian" with Blue Ridge Honor Flight, of Ashville, N.C., escorted Korean War veteran Brownie McCall, right, to the Korean War Memorial in Washington, D.C., Sept. 24, 2016. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016.

Korean war veterans James Jean and Hilliard Staton placed a wreath at the Korean War Memorial in Washington, D.C., Sept. 24, 2016. About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016. The veterans, who were brought to Washington, D.C., courtesy of Blue Ridge Honor Flight out of Ashville, North Carolina, laid a wreath at the memorial and also received from the Korean government a medal commemorating their service. Attending the event with the veterans was U.S. Forces Korea commander, Gen. Vincent K. Brooks, and Maj. Gen. Shin Kyoung-soo, a Korean defense attaché to the United States.

About 88 veterans of the Korean War visited the Korean War Memorial in the nation's capital, Sept. 24, 2016. The veterans, who were brought to Washington, D.C., courtesy of Blue Ridge Honor Flight out of Ashville, North Carolina, laid a wreath at the memorial and also received from the Korean government a medal commemorating their service. Attending the event with the veterans was U.S. Forces Korea commander, Gen. Vincent K. Brooks, and Maj. Gen. Shin Kyoung-soo, a Korean defense attaché to the United States.

Stryker Combat Vehicles, part of 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, participated in an assault exercise, Sept. 20, 2016, at Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

Soldiers with Charlie Company, 1st Platoon, 2-1 Infantry, practiced entering and exiting a Stryker combat vehicle, Sept. 19, 2016, at the Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

Japanese snipers prepare for an assault on an urban target, Sept. 19, 2016, at the Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

After practicing exiting a Stryker combat vehicle, Soldiers with Charlie Company, 1st Platoon, 2-1 Infantry, took firing positions outside their vehicle, Sept. 19, 2016, at Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

Leading Pvt. Hitoshi Okuhira and Sfc. Kentako Mori, both infantry Soldiers with the Japanese Ground Self-Defense Force's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan, participated in the Rising Thunder Exercise, Sept. 19, at Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

Pfc. Juvenal Guzman, 2nd Infantry Division, 2-2 SBCT, 2-1 Infantry, a healthcare specialist and line medic, participated in the Rising Thunder exercise, Sept. 20, 2016, at Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

A Stryker Combat Vehicle, part of 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team participated in an assault exercise, Sept. 20, 2016, at Yakima Training Center. About 900 Soldiers, 300 from Japan's 12th Infantry Regiment, 8th Division, Western Army, out of Kirishima, Japan; and about 600 Soldiers from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, along with other Soldiers from 2nd SBCT, all part of the 7th Infantry Division out of Joint Base Lewis-McChord, Washington, took part in the Rising Thunder exercise, Sept. 6-23 at the Yakima Training Center in Washington State.

Spc. Andres Medina Jr., with Joint Task Force Empire Shield, stands guard in Penn Station, in New York City, Aug. 17, 2016. His mission is to detect and deter terrorism.

Two Soldiers with Joint Task Force Empire Shield stand guard in Grand Central Station, in New York City, Aug. 17, 2016. Their mission is to detect and deter terrorism.

Sgt. Tiffany E. Roman, and Spc. Omar M. Alkasimi, both part of Joint Task Force Empire Shield, stand in formation, Aug. 17, 2016, at Fort Hamilton, New York. Afterward, they will spend the day standing guard in one of several transit hubs around New York City, with the goal of detecting and deterring terrorism.

Soldiers and Airmen with Joint Task Force Empire Shield stand in formation, Aug. 17, 2016, at Fort Hamilton, New York. Afterward, they will spend the day standing guard in one of several transit hubs around New York City with the goal of detecting and deterring terrorism.

Sgt. Erislav J. Astanov and Spc. Saul Revatta, both part of Joint Task Force Empire Shield, stand guard in a shopping mall and commuter hub, known as "the Oculus," located at the World Trade Center complex in New York City, Aug. 16, 2016. Their mission is to detect and deter terrorism.

At the World Trade Center complex in New York City, this fountain and another one just like it mark the footprints of the two towers that fell on Sept. 11, 2001 as a result of the terrorist attack that took place that day.

Deputy Inspector Michael Telfer, Transit Counterterrorism Coordinator with the City of New York Police Department, on the left, meets with Lt. Col. Peter P. Riley, commander of Joint Task Force Empire Shield, Aug. 16, 2016, in a tactical communications vehicle parked near the World Trade Center complex in New York City.

Spc. Andres Medina Jr., with Joint Task Force Empire Shield, stands guard in Penn Station, in New York City, Aug. 17, 2016. His mission is to detect and deter terrorism.

Capt. Rafael O. Ramirez, Charlie Company commander with Joint Task Force Empire Shield, talks with some of his troops in a shopping mall and commuter hub, known as "the Oculus," located at the World Trade Center complex in New York City, Aug. 16, 2016.

One World Trade Center is the main building now standing at the World Trade Center complex in New York City. This new tower was built in the years following the Sept. 11, 2001 terrorist attack. Also at the site, two fountains now mark the footprints of the two towers that fell.

The U.S. Army Financial Management Command has been tasked with getting the Army "auditable," which means ensuring that every financial transaction is properly recorded, in a standardized way, so that outside auditors can demonstrate that the Army is making good use of taxpayer dollars.

The Army recently named two financial institutions that operate on its installations as being the best among their peers in 2015. Of the 22 nominees, the Fort Hood, Texas, branch of Pentagon Federal Credit Union, and the Fort Riley, Kansas, branch of Armed Forces Bank, best met and exceeded the criteria set by the deputy assistant secretary of the Army for financial operations, or DASA(FO), to become the Army credit union and bank of the year for 2015.

A new change to Army regulations ensures that officers selected by boards for promotion meet the standards for exemplary conduct laid out in U.S. law, before their names are forwarded to the Secretary of the Army.

Retired Lt. Col. Charles Kettles and Vice Chief of Staff of the Army Gen. Daniel B. Allyn unveil the plaque bearing Kettles' name on Tuesday, July 19. The plaque will hang in the Hall of Heroes in the Pentagon.

Now-retired Maj. Gen. Jim Jackson, director of the United States of America Vietnam War Commemoration, places a pin on the lapel of now retired Lt. Col. Charles Kettles, July 17, 2016, in Arlington, Virginia. The pin commemorates the 50th anniversary of the Vietnam War. Kettles is scheduled to receive the Medal of Honor on Monday, July 18, at the White House.

Brothers in arms of now-retired Army Lt. Col. Charles Kettles, all Vietnam War veterans, were honored Sunday, July 17, in Arlington, Virginia, with a lapel pin that commemorates the 50th anniversary of the Vietnam War. Kettles will receive the Medal of Honor on Monday, July 18, during a ceremony at the White House. The United States kicked off a commemoration of the 50th anniversary of the start of the Vietnam War on Memorial Day in 2012. Since then, the United States of America Vietnam War Commemoration has handed out more than 850,000 lapel pins to veterans of that conflict

Brothers in arms of now-retired Army Lt. Col. Charles Kettles, all Vietnam War veterans, were honored on Sunday, July 17, in Arlington, Virginia, with a lapel pin that commemorates the 50th anniversary of the Vietnam War. Kettles will receive the Medal of Honor on Monday, July 18, during a ceremony at the White House.

A 15-megawatt solar array at Fort Detrick, Maryland, now provides about 12 percent of power to the installation. While the array started producing power in February, Army officials recognized it's official opening during a June 17, 2016 ceremony at the installation.

Secretary of the Army Eric Fanning inspects the Soldiers of the 3d U.S. Infantry Regiment (The Old Guard) during a full honor arrival ceremony in his honor, June 20, 2016 on Summerall Field at Joint Base Myer-Henderson Hall, Virginia.

Sgt. Maj. of the Army Daniel A. Dailey met with about 100 Junior Reserve Officer Training Corps cadets from the Philadelphia Military Academy, June 13, 2016, at the First Troop Philadelphia City Cavalry armory in Philadelphia, as part of the Army's 241st birthday celebration.

Sgt. Maj. of the Army Daniel A. Dailey and Chef Robert Irvine rappel down the side of the Fox 29 building in Philadelphia, June 14, 2016, during the Army's 241st birthday.

Sgt. Maj. of the Army Daniel A. Dailey and the undersecretary of the Army did morning physical training with more than 80 Soldiers, June 14, 2016, at in downtown Philadelphia at Independence National Historic Park, the same green space that holds the Liberty Bell, and across the street from Independence Hall. The event was part of the Army's 241st birthday celebration.

Under Secretary of the Army Patrick J. Murphy meets with Women's Army Auxiliary Corps veteran Elena Helen Bucci, of Philadelphia, at the Delaware Valley Veterans' Home, June 13, 2016, in advance of the Army's 241st birthday. Bucci joined the WAAC in 1941, and worked as a clerk. She said she was a "bashful type" and joined at the insistence of her mother. "I made my mother proud," she said.

Sgt. Maj. of the Army Daniel A. Dailey meets with Army Air Corps veteran Venuco Carmen, of Philadelphia, at the Delaware Valley Veterans' Home, June 13, 2016, in advance of the Army's 241st birthday. Carmen was drafted in 1942 and worked as a parachute rigger in both theaters in World War II.

Under Secretary of the Army Patrick J. Murphy and Sgt. Maj. of the Army Daniel A. Dailey watch as Army veteran Myer Kurgan cuts an Army birthday cake at the Delaware Valley Veterans' Home, June 13, 2016, in advance of the Army's 241st birthday. Kurgan was drafted into the Army in 1941 and served until 1945.

Under Secretary of the Army Patrick J. Murphy and Sgt. Maj. of the Army Daniel A. Dailey lead a team of more than a dozen Soldiers up the "Rocky Steps" in front of the Philadelphia Museum of Art, June 13, 2016, in advance of the Army's 241st birthday.

Under Secretary of the Army Patrick J. Murphy and Sgt. Maj. of the Army Daniel A. Dailey pose with Soldiers after running up the "Rocky Steps" in front of the Philadelphia Museum of Art, June 13, 2016, in advance of the Army's 241st birthday.

During Army birthday week, senior Army leadership encourages Soldiers to share on social media the physical training activities they do to burn off the calories they'll consume from eating Army birthday cake. Soldiers can share their workout clips via social media at Twitter #EarnYourCake and #USArmy, and also on Facebook at www.facebook.com/USArmy. They can learn more about the campaign at www.army.mil/Birthday.

Gen. Dennis L. Via, commander of Army Materiel Command, Maj. Gen. Christopher P. Hughes, commanding general of Cadet Command, and ROTC Cadet 1st Lt. Morgan Mercer, of Bowie State University, cut a birthday cake, spoke June 3, 2016, during the 100th Anniversary of ROTC commemoration at Pentagon.

Sgt. Maj. of the Army Daniel A. Dailey has announced the creation of his own book club. Beginning in July, he plans to discuss the first of three recommended titles with Soldiers during his regularly-scheduled visits to Army installations. The first of the three books he's recommended is Orson Scott Card's "Ender's Game." The other two titles include Simon Sinek's "Leaders Eat Last," and Simon Sinek's "Start With Why."

Col. Martha K. Lenhart, MD, PhD, second from the left, was named the U.S. Army Hero of Military Medicine during the 2016 Heroes of Military Medicine Awards, May 5, 2016, in Washington, D.C. On stage with Lenhart are Brig. Gen. Robert D. Tenhet, the deputy surgeon general of the Army and the deputy commanding general (support) of U.S. Army Medical Command, left; John W. Lowe, president and CEO, the Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., second from right; and Cynthia L. Gilman, vice president, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Center for Public-Private Partnerships, on the right.

Johnny Matheny, with the Johns Hopkins University Applied Physics Lab, shakes hands with a visitor during DARPA Demo Day, May 11, 2016, at the Pentagon. Matheny wears a prosthetic arm that attaches to his body, through his skin, and into his bone. It's part of the Revolutionizing Prosthetics Program, where DARPA wants to restore near-natural upper extremity control to service members who have lost limbs.

Johnny Matheny, with the Johns Hopkins University Applied Physics Lab, shakes hands with a visitor during DARPA Demo Day, May 11, 2016, at the Pentagon. Matheny wears a prosthetic arm that attaches to his body, through his skin, and into his bone. Researchers at Johns Hopkins, working for DARPA, have developed the experimental arm controlled by nerves with the goal of restoring a sense of normalcy to service members who have lost limbs.

A new Army Directive, released May 6, 2016, allows Soldiers to wear headphones or earbuds while in fitness centers or gyms.

Richard G. Kidd IV, who serves as the deputy assistant secretary of the Army for energy and sustainability, discusses the Army's perspective on climate change during an April 26, 2016 presentation at the Pentagon.

65th Infantry Division veterans Raul Maldonado Peña and Benjaman Pagan Ayala in the nation's capital prior to receiving the Congressional Gold Medal.

65th Infantry Division veteran Emilio Zapato and his son in the nation's capital April 12, 2016 prior to the Congressional Gold Medal ceremony.

Gen. Dalbir Singh, chief of staff of India's army and Chief of Staff of the Army Gen. Mark A. Milley salute during an official welcoming ceremony for Singh, April 7, 2016, at Joint Base Myer-Henderson Hall, Virginia.

Lt. Gen. Robert S. Ferrell, the Army CIO/G-6, announced the release of the Army's new, long-term, network strategy called "Shaping the Army Network (2025-2040)," during a conference, March 31, in Tyson's Corner, Virginia.

By sometime in 2017, the Army, along with its sister services, will have updated many of the computer systems currently running the Microsoft Windows operating system to the latest version, Windows 10.

Sgt. Maj. of the Army Daniel A. Dailey, left, talks with Master Chief Petty Officer of the Navy Mike D. Stevens, center, Sgt. Maj. of the Marine Corps Sgt. Maj. Ronald L. Green, right, and Chief Master Sgt. of the Air Force James A. Cody (back to camera) in advance of a Feb. 26, 2016, testimony on Capitol Hill before the House Appropriations Committee, subcommittee on military construction, veterans affairs and related agencies. The four senior enlisted advisors discussed quality of life issues.

Sgt. Maj. of the Army Daniel A. Dailey, right, speaks with Master Chief Petty Officer of the Navy Mike D. Stevens, left, in advance of a Feb. 26, 2016, testimony on Capitol Hill before the House Appropriations Committee, subcommittee on military construction, veterans affairs and related agencies. The two, along with Sergeant Major of the Marine Corps Sgt. Maj. Ronald L. Green and Chief Master Sergeant of the Air Force James A. Cody discussed quality of life issues.

Army Brig. Gen. Carl A. Alex, assistant deputy chief of staff, G-3/5/7, U.S. Army Forces Command, left, was recognized during the 11th Annual Stars and Stripes honors, Feb. 19, 2016, during the 30th Annual Black Engineer of the Year Awards science, technology, engineering, and mathematics conference in Philadelphia, Pennsylvania. Vice Chief of Staff of the Army Gen. Daniel B. Allyn, presented the award.

Gen. Dennis L. Via, commander of U.S. Army Materiel Command, was among the 140 senior-level leaders from across the U.S. armed forces who took part in a Feb. 19, 2016, series of STEM-themed mentoring sessions in Philadelphia for high school-aged youth. The mentoring sessions involved more than 300 youth from Philadelphia, Washington, D.C., Maryland and Virginia, and were part of the larger Black Engineer of the Year STEM conference.

Maj. Gen. Thomas A. Horlander, director of the Army budget, outlines the Army's fiscal 2017 budget during a briefing at the Pentagon, Feb. 9, 2016.