U.S. Marines with 2nd Air Naval Gunfire Liaison Company assist forward observer teams from the British Royal Army while conducting live-fire missions as part of Exercise Green Cannon 18 at Salisbury Plains, United Kingdom, July 4, 2018. Green Cannon is an annual live-fire exercise between the United States Marine Corps, allied and partner nations in order to increase interoperability in the region. (U.S. Marine Corps photo by Cpl. David Delgadillo)

Photo by Cpl. David Delgadillo