A Marine with Oscar Battery, 5th Battalion, 14th Marines, 4th Marine Division, observes howitzer barrel elevation during Integrated Training Exercise (ITX) 4-21 at Marine Corps Air Ground Combat Center Twentynine Palms, California on July 26, 2021. Reserve Marines and Sailors have come together from across the country as an integrated Marine Air-Ground Task Force to take part in a live-fire, combined arms exercise that will better prepare Marine Forces Reserve in its mission to augment and reinforce the Active Component. (U.S. Marine Corps photo by Lance Cpl. David Intriago)