U.S. Marine Corps Lance Cpl. Jacob Blattner, an aircraft rescue and firefighting specialist with Marine Wing Support Squadron 471, Marine Aircraft Group 41, 4th Marine Aircraft Wing, pulls a weighted sled during a physical training test at Canadian Forces Base Cold Lake, Canada, June 14, 2019, in support of Sentinel Edge 19. Each portion of the test simulated tasks that every Reserve Marine with Aircraft Rescue and Firefighting would be expected to complete in a timely manner if an accident were to occur in an airfield. Reserve Marines with MAG-41 conducted the test to maintain job proficiency and ensure deployment readiness. (U.S. Marine Corps photo by Lance Cpl. Jose Gonzalez)