U.S. Army Lt. Gen. Kevin W. Mangum, U.S. Army Training and Doctrine Command deputy commander, speaks of the important role the Army Reserve plays in mission success during the U.S. Army Reserve’s 107th birthday celebration at TRADOC on Fort Eustis, Va., April 23, 2015. During the celebration, the oldest and newest member of the Reserve cut the birthday cake together and two Soldiers were re-enlisted. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)