Marines in Corporals Course 4-16 take part in a casualty and resupply run at Marine Forces Reserve, Sept. 28, 2016. The run was the final physical training event for the course and each participant had to stay mentally and physically tough to accomplish the mission. The course is designed to provide Marine Corps Corporals with knowledge and skills necessary to become successful small-unit leaders. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released)