Maj. Gen. Timothy Leahy, 2nd Air Force commander, observes students from the 364th Training Squadron cables and antenna systems apprentice course during his visit at Sheppard Air Force Base, Texas, Oct. 30, 2017. Second Air Force provides training from aircraft maintenance to space and missile operations for Airmen, Soldiers, Sailors, Marines and international students. (U.S. Air Force photo by Christopher Carranza)