Soldiers conduct a night base defence live-fire exercise under the illumination of a green flare during the Combined Arms Exercise: Patriot Crucible. Image: US Army

Soldier fires an AT4 Anti-tank weapon during Exercise Agile Spirit in Georgia. The AT4 is intended to give infantry units a means to destroy or disable armoured vehicles and fortifications. Image: US Army

US Army paratroopers conduct training in preparation for air assault operations during Exercise Swift Response. Image: US Army

Soldiers position their M1150 assault breacher vehicle during a live-fire training exercise. Image: US Army

F-35 Lightning II demonstration team members showcase their skills at the Defenders of Liberty Air & Space Show. Image: US Air Force

A MiG-17F performs an aerial maneuver during the Twilight Show at Barksdale Air Force Base. Image: US Air Force

USS Donald Cook passes the Rock of Gibraltar while it transits the Strait of Gibraltar. Image: US Navy

An F/A-18F Super Hornet maneuvers on the flight deck of the aircraft carrier USS Abraham Lincoln. Image: US Navy

US Marines hike towards their next objective during a training exercise. Image: US Marine Corps