Electronic warfare airmen from the 2nd Aircraft Maintenance Squadron unload chaff from a B-52H Stratofortress on Barksdale Air Force Base, La., July 11, 2012. Only B-52Hs not participating in the Red Flag exercise at Nellis AFB, Nev., had their chaff removed. Airmen loaded the remaining chaff onto B-52s departing for the exercise to save the Air Force money. Chaff is used as a defensive measure to conceal the aircraft from enemy radar by dispensing small, thin pieces of metal.