Marines with Transportation and Support Company, Combat Logistics Battalion 2, 2nd Marine Logistics Group attach a tow bar to a medium tactical vehicle replacement during one of the six obstacles during a fire team challenge aboard Camp Lejeune, N.C., June 27, 2013. Service members with T&S; Co. were evaluated while assembling and disassembling machine guns, performing a casualty assessment and treatment, and answering a 30 question Marine Corps knowledge test.