Yale Hat Defense Secretary Ash Carter shows off a Yale Air Force ROTC hat that was presented to him after he delivered remarks at a commissioning ceremony at Yale University in New Haven, Conn., May 23, 2016. DoD photo by Air Force Senior Master Sgt. Adrian Cadiz SHARE IMAGE: Download Image: Full Size (1.8 MB) Tags: ASH Carter, SecDef, AIR FORCE, Airmen Photo By: Senior Master Sgt. Adrian Cadiz VIRIN: 160523-D-DT527-363.JPG Photo Gallery