CHECK SIX U.S. Air Force Airman 1st Class Jon Peterson, left, and Senior Airman Cameron Corricelli, right, participate in Check Six program instruction on Bagram Air Field, Afghanistan, Oct. 21, 2014. The program is designed to prepare service members to respond to attacks. Peterson is deployed from Travis Air Force Base, Calif. Corricelli is deployed from Charleston Air Force Base, S.C. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 498581-Q-MGK33-830.jpg Photo Gallery