Spc. William Jackson of 3rd Platoon, Delta Company, 1st Battalion, 187th Infantry Regiment, 101st Airborne Division installs a 50-Caliber machine gun on the gunbox of a Humvee before going on a mission at the Al Fatah Bridge, Iraq basecamp on March 28, 2006. (U.S. Army photo by Spc. Charles W. Gill, 55th Combat Camera/Released)