Marines with 2nd Battalion, 3rd Marine Regiment, 3rd Marine Division fire an M240B machine gun at targets during Range 400 at Marine Corps Air Ground Combat Center Twentynine Palms, California, Feb. 1, 2021. Range 400 is a training event that takes place during an integrated training exercise (ITX). ITX is a 28-day training evolution that involves a series of progressive live-fire exercises that assess the ability and adaptability of a force of more than 3,500 Marines and sailors.

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