Raise the Stakes by Marines Via Flickr: Marines and sailors conduct a movement during the Combat Instructor Stakes on Camp Lejeune, North Carolina, March 16, 2015. The School of Infantry-East hosted the Combat Instructor Stakes, which is a grueling 30-hour competition that pits two man teams against each other, competing in physical, tactical and knowledge based events while carrying a combat load and moving over 50 kilometers on foot. (U.S. Marine Corps photo by Cpl. Andrew Kuppers/ Released)