A U.S. Army soldier uses a nail gun to secure the roofing board over a porch during this year's annual training building three cabins at the Disabled Veterans Rest Camp in Marine St. Croix, Minn., May 19, 2010. A U.S. Army soldier uses a nail gun to secure the roofing board over a porch during this year's annual training building three cabins at the Disabled Veterans Rest Camp in Marine St. Croix, Minn., May 19, 2010. SHARE: Download: Full Size (5.78 MB) Tags: Photo Essays Credit: VIRIN: 451213-N-HAE60-872.jpg Photo Gallery