190521-M-SX657-0068 OKINAWA, Japan (May 21, 2019) U.S Marines and Navy Seabees hoist a roller bar under simulated combat conditions at Track Gap Training Area, Camp Hansen, Okinawa, Japan, May 21, 2019. Marines with Bridge Company, 9th Engineer Support Battalion, 3rd Marine Logistics Group and Seabees with Naval Mobile Construction Battalion 4 conduct medium girder bridge operations to demonstrate proficiency in advanced MGB employment, validate procedures and showcase interoperability. (U.S. Marine Corps photo by Cpl. Ryan Harvey)