A U.S. fighter pilot helmet and oxygen mask pictured in a locker at Volk Field Combat Readiness Training Center (CRTC), Wis., in this photo released March 21, 2011. Airmen from the 126th Air Refueling Wing (ARW) from Scott Air Force Base, Ill., and the 108th ARW at Joint Base McGuire-Dix-Lakehurst, N.J., gathered at the CRTC to form the 419th Air Expeditionary Wing. The Airmens ability to survive and operate under simulated combat scenarios was tested during a two-day operational readiness exercise.