Wall Walker Marine Corps Gunnery Sgt. Neil McCoy scales a wall while running the NATO obstacle course during the 2021 Iron Mike Competition at Marine Corps Base Quantico, Va., May 1, 2021. The competitors covered a distance of more than 15 miles over the course of 11 hours, completing multiple physical and core skills challenges along the way. SHARE IMAGE: Download Image: Full Size (2.28 MB) Tags: marine corps Photo By: Marine Corps Lance Cpl. Kedrick Schumacher VIRIN: 210501-M-RT859-0339Y.JPG Photo Gallery