U.S. Air Force Staff Sgt. Jacquelyn Estrada, left, and Senior Airman Megan Gilliland, photojournalists from the 4th Combat Camera Squadron, March Air Reserve Base, Calif., work together to assemble their tactical vests as part of a protective gear familiarization class at March ARB on July 27, 2013. (U.S. Air Force photo by TSgt Erica J. Knight/released)