A SESAMS (simulated ammunition) shell flies out the M4 assault rifle chamber of Lance Cpl. Angel Anguiano, a crew chief with 2nd Assault Amphibian Battalion, 2nd Marine Division, while defending a position at Mobile MOUT Town aboard Marine Corps Base Camp Lejeune, Oct. 20, 2013. “‘Amtrackers’ are known for being flexible and being able to conduct any mission, whether it’s assaulting a beach and taking it over or supporting the infantry in an urban environment; both of those are gained by doing this training,” said 1st Lt. Michael Bianca, a platoon commander with the battalion, and Huntsville, Ala., native.