A U.S. Army soldier caulks a roof edge. A U.S. Army soldier from 84th Engineer Combat Battalion caulks a roof edge to give a smoother-looking appearance to Engineering Civic Action Project Site 5 in Buriram Province, Thailand, during exercise Cobra Gold on May 1, 2008. The exercise provides constructive benefits in the form of a multi-purpose school building for Thai children through combined U.S.-Thai civil affairs projects. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 887764-U-IVE21-064.jpg Photo Gallery