Image 0 of 5U.S. Army Soldiers from the New Jersey National Guard's 1-150 Assault Helicopter Battalion fly in a UH-60 Black Hawk helicopter during a training mission at Joint Base McGuire-Dix-Lakehurst. (Sgt. Matt Hecht/Air National Guard) Marines conduct a low-light deck shoot to maintain marksmanship proficiency while underway aboard the amphibious assault ship USS America in the U.S. 5th Fleet area of responsibility, Nov. 26, 2017. (Cpl. Dusty Kilcrease/Marine Corps) Marines with Battalion Landing Team, 1st Battalion, 5th Marine Regiment, 15th Marine Expeditionary Unit fire a M224 60 mm mortar system. (Cpl. Timothy Valero/Marine Corps) An unidentified paratrooper conducts airborne operations at Sicily Drop Zone during the 20th Annual Randy Oler Memorial Operation Toy Drop. Operation Toy Drop, hosted by the U.S. Army Civil Affairs and Psychological Operations Command (Airborne) is the largest combined airborne operation conducted worldwide. (Staff Sgt. Timothy R. Koster/Army) U.S. Army Reserve Spc. Christopher Landon, a motor transport operator assigned to the 182nd Transportation Company, fires an M240B machine gun as part of Operation Cold Steel II, hosted by the 79th Theater Sustainment Command at Fort Hunter Liggett, Calif. (Sgt. Heather Doppke/Army)