The U.S. Army Chief of Engineers and the Commanding General of the U.S. Army Corps of Engineers (USACE) Lt. Gen. Thomas P. Bostick, left, listen to Trisha Gueroy sing "A Change is Gonna Come" during the DTHC's black history month program at the Pentagon's auditorium in Washington, Feb. 27, 2014. (U.S. Army photo by Eboni Everson-Myart/Released)