A U.S. Marine aircraft rescue and firefighting specialist with Marine Wing Support Squadron 471, Marine Aircraft Group 41, 4th Marine Aircraft Wing, assist another Marine with putting on his gear during combined firefighting training at Canadian Forces Base Cold Lake, Canada, June 16, 2019, in support of Sentinel Edge 19. The Marine Reserve plays a critical component to the Marine Corps’ Total Force, and training such as SE19 helps ensure Reserve units combat effectiveness and proficiency for world-wide deployment. (U.S. Marine Corps photo by Sgt. Andy O. Martinez)