317th Impact Day
U.S. Air Force Captain Terry Wu, 40th Airlift Squadron, and Captain Heather Lendrum, 39th Airlift Squadron, C-130J Super Hercules pilots, perform preflight checks Nov. 21, 2013, during Impact Day at Dyess Air Force Base, Texas. Impact Day was designed to give maintainers and aircrew personnel a chance to see what each other do on a daily basis . Preflight checks are performed to ensure every system on the aircraft is operating correctly and safely prior to flight. (U.S. Air Force photo by Staff Sgt. Vernon Young Jr./Released)