U.S. Marine Corps Corporal Mark Hickok patrols through a field during a clearing mission in Marja in Afghanistan's Helmand province, April 9, 2011. Hickok, a combat engineer, is assigned to the 1st Combat Engineer Battalion. U.S. Marine Corps Corporal Mark Hickok patrols through a field during a clearing mission in Marja in Afghanistan's Helmand province, April 9, 2011. Hickok, a combat engineer, is assigned to the 1st Combat Engineer Battalion. SHARE IMAGE: Download Image: Full Size (2.54 MB) Tags: Photo Essays Photo By: VIRIN: 762704-C-MFT99-239.jpg Photo Gallery