Clean Sweep
Airmen prepare to perform a foreign object debris walk Sept. 21, 2015, at Yokota Air Base, Japan. FOD is any object potentially harmful to an aircraft, ranging from bolts, screws and other metal pieces, to rocks, paper and plastic. FOD can cost the Air Force millions of dollars in avoidable aircraft damage. Adobe Photoshop was used to merge multiple photos to create a panoramic. (U.S. Air Force illustration by Airman 1st Class Delano Scott/Released)