130819-N-OV434-256 Builder 2nd Class Christopher Beeler (left) and Builder 1st Class Jeremiah Shuemaker, both assigned to Naval Mobile Construction Battalion (NMCB) 15 measure plywood floors while building a compound for an Army Combat Service Support (CSSB) Brigade. NMCB 15 is currently mobilized in support of Operation Enduring Freedom and is an expeditionary element of U.S. Naval Forces that support various units worldwide through national force readiness, civil engineering, humanitarian assistance, and building and maintaining infrastructure. (U.S. Navy photo by Mass Communication Specialist 1st Class Daniel Garas)