Marines with Headquarters Company, Combat Logistics Regiment 17, 1st Marine Logistics Group, conduct a Halloween-themed, physical training circuit aboard Camp Pendleton, Calif., Oct. 30, 2013. The Marines wore Halloween costumes and held a festive costume competition at the end of the exercise to build unit cohesion and provide them an opportunity to unwind and have fun with their peers. (U.S. Marine Corps photo by Lance Cpl. Shaltiel Dominguez/ Released)