U.S. Marine Corps Cpl. Ryan Nascimento, a chemical, biological, radiological and nuclear defense specialist, reads off casualty information for a nine-line medical evacuation request during a Combat Lifesaver Course practical application at Marine Corps Base Camp Pendleton, California, March 30, 2022. CLS is a three-day course that teaches Marines lifesaving medical techniques to eliminate preventable loss of life on the battlefield. - U.S. Marine Corps Cpl. Ryan Nascimento, a chemical, biological, radiological and nuclear defense specialist, reads off casualty information for a nine-line medical evacuation request during a Combat Lifesaver Course practical application at Marine Corps Base Camp Pendleton, California, March 30, 2022. CLS is a three-day course that teaches Marines lifesaving medical techniques to eliminate preventable loss of life on the battlefield.

A U.S. Marine with Lima Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, watches over the objective during an airfield seizure mission as part of Composite Training Unit Exercise on San Clemente Island, California., March 22, 2015. These Marines inserted onto the island to execute a raid and practice their urban combat skills. - A U.S. Marine with Lima Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, watches over the objective during an airfield seizure mission as part of Composite Training Unit Exercise on San Clemente Island, California., March 22, 2015. These Marines inserted onto the island to execute a raid and practice their urban combat skills.