A pair of young sledders kick up snow as they try to come to a stop on the slopes of Grindelwald, Switzerland, on Jan. 2, 2002.

Kirkuk, Iraq, May 5, 2003: Air Force Master Sgt. Daniel Wear, Staff Sgt. Chip Davidson, and Staff Sgt. Brian Curtis, left to right, hoist a strand of concertina wire to help secure a living area.

When President Jimmy Carter commuted the prison sentences of the four Puerto Rican nationalists who attacked members of Congress and President Harry S. Truman in the 1950s, he cited “humane considerations.”

Baghdad, Iraq, April 8, 2003: A Marine mans a M-240G machine gun on the outskirts of Baghdad, Iraq, as smoke from a burning building billows by.

Hohenfels, Germany, April 11, 2016: Soldiers from the 173rd Airborne Brigade and Italian troops get set to jump out of a C-17 above Hohenfels, Germany, as part of exercise Saber Junction.

Capt. Hugh Nelson Jr. and Kenneth David, who fought in the Vietnam War, are the latest recipients of the Medal of Honor, the nation’s highest military award for valor in combat.

Five Korean War soldiers whose extraordinary heroism was not fully recognized at the time will be posthumously awarded the Medal of Honor as part of a campaign to shine a light on the role of minority service members in defense of the nation.

USS Kitty Hawk, off the coast of Japan, Pacific Ocean, April 15, 2002: Petty Officer 2nd Class Jack Lazenby, an air traffic controller, updates flight information on a board in the USS Kitty Hawk’s air traffic control center.