U.S. Air Force airmen perform a foreign object debris walk on the flight line at Luanda Air Base, Angola, before the arrival of a C-130J Super Hercules March 22, 2014. The airmen are participating in African Partnership Flight with the Angolan and Zambian air forces, an event which provides a collaborative learning environment for the airmen. (U.S. Air Force photo/Tech. Sgt. Benjamin Wilson)