Cadet Alexandra Duhaime, Air Force Reserve Officer Training Corps Detachment 842, has her second lieutenant rank pinned on by her brothers, Brian and Michael, during her commissioning ceremony May 10, 2018, at the University of Texas San Antonio. Air Force ROTC is one of the three primary commissioning sources for officers in the United States Air Force, the other two being the United States Air Force Academy and Air Force Officer Training School. (U.S. Air Force photo by Sean M. Worrell)