WHITEMAN AIR FORCE BASE, Mo. - Airman Jill Hallandsworth (left), 442nd Fighter Wing crew chief, gathers the tools needed to perform a preflight inspection on an A-10 Thunderbolt II as her partner David Greenberg, 442nd FW crew chief, discusses what parts the aircraft will need, Sept. 25. Crew chiefs with the 442nd FW maintain a vast fleet of 27 A-10 aircraft, keeping each jet prepared for any mission at a moment's notice. (U.S. Air Force photo/Senior Airman Kenny Holston)