Seabees from Naval Mobile Construction Battalion (NMCB) 15 set security in a simulated build site during training to prepare for their final evaluation problem (FEP) before deployment. FEP is used to train and evaluate Seabees on various scenarios they may face. NMCB 15 is mobilized in support of Operation Enduring Freedom and is an expeditionary element of U.S. Naval Forces that act as combat engineers and support various units worldwide through national force readiness, humanitarian assistance and building and maintaining infrastructure. (U.S. Navy photo by Mass Communication Specialist 2nd Class Daniel Garas/Released)