Afghan soldiers rest in an Mi-17 helicopter after evacuating from an outpost, 2015

Over Afghanistan, Jan. 6, 2015: Afghan National Army soldiers rest in the back of an Mi-17 helicopter after being evacuated from a remote outpost in southern Afghanistan.

Crew from the USS George H.W. Bush receive instructions in Norfolk, 2009

Norfolk, Virginia, Jan. 9, 2009: BMSN Riscinda Rogers, Chicago, Il., left, and the crew of the Nimitz-class aircraft carrier USS George H.W. Bush receive instructions to prepare the ship for the arrival of President George W. Bush for the next day’s commissioning ceremony.

Infantry troops take part in the Carbide Ice exercise in Germany, 1969

Grafenwoehr, Germany, Feb. 3, 1969: Infantry troops taking part in the Carbide Ice exercise are silhouetted against the morning sun as they roll through the village of Koenigstein in the Vilseck — Grafenwoehr area.

Rancher watches over a herd of sheep in Kyrgyzstan, 2013

Manas, Kyrgyzstan, Dec. 6, 2013: A rancher watches over a herd of sheep in a field just outside the U.S. Air Force’s transit center in Manas, Kyrgyzstan.

Children dress up in costumes at a Halloween party in Germany, 1948

Heidelberg, Germany, Oct. 30, 1948: Devils, ghosts, pirates, ladies and what appears to be a time travelling Austrian Hungarian police officer from the early 1900s pose for a photo.

Children dress up in costumes during a Halloween celebration in Germany, 1948

Children — donned in their best Halloween costumes — are eager to pet “Clarence the Camel,” the mascot of the pilots of the 86th Fighter Group and donate some of their candy to the children of Berlin, so that Clarence can ferry them to the blockaded city on his own C47 Operation Vittles flight.

Woman gives a questioning look on a street in Andorra la Vella, 1962

Andorra la Vella, Sep. 27, 1962: An Andorran woman throws the photographer a questioning look on a street in Andorra la Vella, Andorra.

Soldier cleans his pistol after shooting in Germany, 1947

Grafenwoehr, Germany, Aug. 28, 1947: Staff Sgt John L. Bell, L Company, 18th Infantry Division cleans his pistol after shooting.

Army major confers with Vietnamese officers in South Vietnam, 1962

Soc Trang, South Vietnam, May 9, 1962: Army Maj. Robert M. Campbell (center) sector advisor for Vietnamese troops operating in the Vinh Long Province, confers with two Vietnamese officers after Marine Helicopter Squadron 362 — aka “Archie’s Angels” — ferried them into the Mekong Delta area.

Young girls paint puppets at an orphanage in Seoul, 1959

Seoul, South Korea, September 1959: Children carefully paint the features on puppets in one of the classroom of the Seoul Children’s home.