Builder 1st Class Michael Erler, assigned to Naval

Builder 1st Class Michael Erler, assigned to Naval Mobile Construction Battalion (NMCB) 15, uses a machine to smooth concrete as he works to complete a runway expansion project. 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)