Wired for sound protection
Senior Airman Brian Brewster installs concertina wire June 8 on a wall to protect one of the compounds on Ali Air Base, Iraq. Airman Brewster is a member of the 407th Expeditionary Security Forces Squadron's Force Protection Flight. The flight is responsible for monitoring local and third country nationals to detect suspicious activity, augmenting security forces during increased threat levels, as well as monitoring and maintaining installation security measures. (U.S. Air Force photo/Master Sgt. Robert W. Valenca)