U.S. Air Force Staff Sgt. Arjune Haynes, 633rd Medical Operations Squadron cardiopulmonary services assistant noncommissioned officer in charge, reviews an echocardiogram at Langley Air Force Base, Va., Jan. 16, 2015. Haynes, originally from Trujillo, Panama, was inspired to join a branch of the U.S. Armed Forces after a life-changing encounter with a Service member during Operation Just Cause in 1989. (U.S. Air Force photo illustration by Senior Airman Aubrey White/Released)