CONVOY EXERCISE Four U.S. Marines dismount their vehicles during a convoy training exercise to provide unit security while fellow Marines notionally call an explosive ordinance disposal team to investigate a mock improvised explosive device near Hawthorne Army Ammunition Depot in Hawthorne, Nev., March 7, 2009. The Marines are assigned to Weapons Company, 3rd Battalion, 4th Marine Regiment. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 468060-G-HOQ34-370.jpg Photo Gallery