A fire team of Marines with Company C, 6th Engineer Support Battalion, 4th Marine Logistics Group, Marine Forces Reserve, and commandos with 131 Commando Squadron Royal Engineers, British army, prepare to clear a high-threat building during a simulated raid on an urban compound at exercise Red Dagger at Fort Indiantown Gap, Penn., June 13, 2016. Red Dagger is a bilateral training exercise that gives Marines an opportunity to exchange tactics, techniques and procedures as well as build working relationships with their British counterparts. (U.S. Marine Corps photo by Sgt. Ian Leones/Released)