The United States Army

A U.S. Army Reserve combat engineer Soldier from the 374th Engineer Company (Sapper), headquartered in Concord, California, tries to stand up with a loaded ruck sack, full of water, during Combat Water Survival Training at Fort Hunter Liggett, California, July 17, during Sapper Leader Course Prerequisite Training, a two-week field exercise at Camp San Luis Obispo Military Installation, California.

U.S. Army Soldiers participate in rappel training during the Ranger Course on Camp Merrill in Dahlonega, Ga., July 12, 2015. Soldiers attend the Ranger Course to learn additional leadership and small unit technical and tactical skills in a physically and mentally demanding, combat simulated environment.

A U.S. Army paratrooper assigned to 1st Brigade Combat Team, 82nd Airborne Division, exits a CH-47 aircraft during Operation Federal Eagle, July 15, 2015. The operation is an annual joint-airborne operation held between U.S. and German paratroopers to promote friendship and military partnership.

Pfc. Blaine Emory, a Soldier assigned to 1st Platoon, P Troop, 4th Squadron, 2nd Stryker Cavalry Regiment, fires a Polish RPG-7D rocket-propelled grenade alongside a Polish paratrooper from the 6th Airborne Brigade during allied weapons training, July 9, 2015, at Nowa Deba Training Area in southern Poland. The Soldiers are participating in Atlantic Resolve, an ongoing multinational operation focused on joint training and security cooperation between NATO allies.

A U.S. Soldier trains his working dog on Bagram Airfield, Afghanistan, July 4, 2015. The Soldier is assigned to the 709th Military Police Battalion, 18th Military Police Brigade.

A U.S. UH-60 Blackhawk helicopter crew chief, assigned to the Alaska National Guard, conducts water bucket operations during a fire-fighting mission south of Tok, Alaska, June 26, 2015. Two UH-60 helicopters aided in fighting the wildfire in coordination with the Bureau of Land Management, Fire Services based out of Fort Wainwright, Alaska.

President Barack Obama bestows the Medal of Honor to Army Sgt. William Shemin, accepting on his behalf are his daughters Elsie Shemin-Roth (middle) and Ina Bass (left), in the East Room of the White House, June 2, 2015. Shemin, a Jewish-American, distinguished himself as a member of 2nd Battalion, 47th Infantry Regiment, 4th Infantry Division, American Expeditionary Forces, during combat operations against the enemy on the Vesle River, near Bazoches, France, during World War I. While serving as a rifleman from August 7-9, 1918, Shemin left the cover of his platoon's trench and crossed open space in full sight of the Germans, repeatedly exposing himself to heavy machine gun and rifle fire to rescue the wounded. After officers and senior noncommissioned officers had become casualties, Shemin took command of the platoon and displayed great initiative under fire, until he was wounded, Aug. 9. Shemin was wounded by shrapnel and a machine-gun bullet that pierced his helmet that was lodged behind his left ear, leaving him partially deaf.

U.S. service members from the Defense POW/ MIA Accounting Agency, or DPAA, escort the recently disinterred remains of a service member from the U.S.S. Oklahoma, previously buried as unknown. The disinterments taking place at the National Memorial Cemetery of the Pacific, Honolulu, HIawaii, June 8, 2015, were conducted in effort to identify the U.S. service members. The mission of DPAA is to conduct global search, recovery and laboratory operations to provide the fullest possible accounting for our missing personnel to their families and the nation.

Army visually impaired cycling teams finish together to take the gold, silver and bronze in the 2015 Department of Defense Warrior Games at Marine Corps Base Quantico, Va., June 21, 2015.

Lithuanian Land Forces Soldiers from 2nd Coy, Iron Wolf Brigade fire a smoke screen from an M113A1 Armored Personnel Carrier during a joint live-fire exercise with their American partners - U.S. Army unit Team Eagle, Task Force 2-7 Infantry, held at the Great Lithuanian Hetman Jonusas Radvila Training Regiment, in Rukla, Lithuania, May 22, 2015. As part of Atlantic Resolve, an ongoing multi-national partnership focused on joint training and security cooperation between the U.S. and other NATO allies, the Soldiers of Team Eagle work with and around their Lithuanian, Polish, Portuguese, French and German allies on a daily basis.

Pfc. Johnny Allen, 3rd U.S. Infantry Regiment (The Old Guard), Charlie Company, places American flags at the headstones in Section 12 of Arlington National Cemetery during "Flags in," May 21, 2015, in Arlington, Va. The Old Guard has conducted "Flags-in" - when an American flag is placed at every headstone - since 1948.

Soldiers from the 2nd Brigade Combat Team, 82nd Airborne Division, move their injured Soldier from one building to another during an exercise mission in Fort Bragg, N.C., April 15, 2015, as part of the Combined Joint Operational Access Exercise 15-01. It is an 82nd Airborne Division-led bilateral training event at Fort Bragg, N.C., from April 13-20, 2015. This is the largest exercise of its kind held at Fort Bragg in nearly 20 years and demonstrates interoperability between U.S. and U.K. Army Soldiers in addition to U.S. Air Force, Air National Guard and Royal Air Force airmen, and U.S. Marines stationed out of Camp Lejeune, N.C.

Aviators from the Bravo Company, 3-158th Assault Helicopter Battalion, 12th Combat Aviation Brigade, provide aviation support for helocast training, April 2, 2015, with Soldiers from the Latvian Special Forces over the Daugava River in Latvia.

Spc. Justin Yarnell, Company C, 2nd Battalion, 505th Parachute Infantry Regiment, 3rd Brigade Combat Team, 82nd Airborne Division, helps an Iraqi army soldier during a weapons qualification at Camp Taji, Iraq, March 8, 2015. Yarnell and his fellow 82nd Airborne Division Soldiers are deployed to advise, teach and mentor Iraqi Security Forces so they are better prepared to fight Da'ish.

A Soldier assigned to 1st Battalion, 10th Special Forces Group (Airborne), salutes his fellow Soldiers while jumping out of a C-130 Hercules aircraft over a drop zone in Germany, Feb. 24, 2015.

Dragoons assigned to Bull Troop, 1st Squadron, 2nd Cavalry Regiment participated in a live-fire exercise at Grafenwoehr Training Area located near Rose Barracks, Germany, March 5, 2015. Troopers conducted group and tactical movements while attacking an objective assisted by their Strykers and mortar fire during the exercise.

CH-47F Chinook helicopter crew chiefs, assigned to 25th Combat Aviation Brigade, 25th Infantry Division, support 1st Special Forces Group during helocast operations into the waters off of Marine Corps Training Area Bellows, Hawaii, March 16, 2015.

Sgt. Maj. Daniel A. Dailey thanks his mother during the swearing-in ceremony for Dailey as the 15th sergeant major of the Army, Jan. 30, at the Pentagon. Dailey will serve as the Army chief of staff's personal adviser on matters affecting the Army's enlisted force.

Chief of Staff of the Army General Raymond T. Odierno's testimony on the impact of the Budget Control Act of 2011 and Sequestration on National Security at the Senate Armed Service Committee congressional testimony, Dirksen Senate Office Building, Washington, D.C., Jan. 28, 2015.

Paratroopers from 173rd Brigade Support Battalion, 173rd Airborne Brigade, conduct an airborne operation from a U.S. Air Force 86th Air Wing C-130 Hercules aircraft at Juliet Drop Zone in Pordenone, Italy, Jan. 13, 2015. The 173rd Airborne Brigade is the Army Contingency Response Force in Europe, capable of projecting ready forces anywhere in the U.S. European, Africa or Central Command areas of responsibility within 18 hours.