ROOF REPAIR U.S. Navy Petty Officer 1st Class Patrick Koelle applies aluminium panels for the roof of an open classroom and pavilion at Centro Escolar Elementary School in La Union, El Salvador, Dec. 13, 2011. Koelle is a utilities man assigned to Navy Mobile Construction Battalion 23. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 553369-J-PAX84-954.jpg Photo Gallery