U.S. Air Force Senior Airman Robert Garcia performs

U.S. Air Force Senior Airman Robert Garcia performs a buddy check on Senior Airman Ronald Lozada donning a 3M Full Face Respirator prior to entering a B-1 Weapons bay tank during an annual confined space extraction exercise in Southwest Asia, June 19, 2012. Both airmen are fuel system journeymen assigned to the 379th Expeditionary Maintenance Squadron. Garcia is deployed from the 452nd Maintenance Squadron, March Air Reserve Base, Calif., and is a native of Riverside, Calif., and Lozada is deployed from the 22nd Maintenance Squadron, McConnell Air Force Base, Kan., and is a native of Salinas, Calif.