Image 0 of 5An Army medicine sergeant and military working dog assigned to the 525th Military Working Dog Detachment prepare to board a helicopter Nov. 28, 2017, during MEDEVAC training for MWD teams. (Staff Sgt. Lester Cannon/Army) A Marine with Company A, 1st Battalion, 5th Marine Regiment the 15th Marine Expeditionary Unit's Ground Combat Element, fires an M72A7 rocket launcher Oct. 23, 2017, during a familiarization course at an undisclosed location. (Cpl. Timothy Valero/Marine Corps) Senior Airman Taylor Lahteine, an explosive ordnance disposal journeyman assigned to the 379th Expeditionary Civil Engineer Squadron, operates a Remotec Andros F6A Remote Ordnance Neutralization System during a joint chemical threat training exercise at Al Udeid Air Base, Qatar, Nov. 25, 2017. (Staff Sgt. Patrick Evenson/Air National Guard) The amphibious assault ship USS America (LHA 6), center, the Arleigh Burke-class guided-missile destroyer USS Hopper (DDG 70), left, and the Anzac-class frigate HMAS Warramunga (FFH 152) steam in formation Nov. 28, 2017, while participating in a photo exercise in the Arabian Gulf. (MC2 Alexander Ventura II/Navy) Machine gunners fire M240B machine guns and M2 .50 caliber machine guns from the turrets on Mine-Resistant Ambush Protected All-Terrain Vehicles during live-fire squad maneuver training, Oct. 23, 2017, at an undisclosed location. (Cpl. Timothy Valero/Marine Corps)