URBAN STRIDE U.S. Marines and Navy sailors participate in a clearing exercise in the urban terrain facility on the Marine Corps Air Ground Combat Center in Twentynine Palms, Calif., Oct. 2, 2008. The Marines and sailors are assigned to Alpha Company, 1st Battalion, 7th Marine Regiment. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 273643-I-WKR08-163.jpg Photo Gallery