Seabees assigned to Naval Mobile Construction Battalion (NMCB) 40, defend their camp in a simulated firefight as part of their final evaluation during a training exercise at Forth Hunter Liggett, Calif. NMCB 40 is currently participating in its final field training exercise and evaluation before their upcoming U.S. Pacific Command deployment in November. The battalion is scheduled for decommission at the conclusion of deployment in Sept. 2012. (U.S. Navy photo by Chief Mass Communication Specialist Michael B. Watkins/Released)