SANTA RITA, Guam (Oct. 14, 2020) Marine Corps Lance Cpl. Alex Jacobson, assigned to 5th Marine Regiment, aims a training M4 carbine while participating in a sentry boat simulator drill during a Marine integration exercise with maritime expeditionary security forces from Task Force 75 on Naval Base Guam. (U.S. Navy photo by Mass Communication Specialist 1st Class Adam Brock)