U.S. Army Sgt. Michael Buchanan, a jump master with 3rd Battalion, 238th General Support Aviation Regiment, sits on the loading ramp of a U.S. Army Boeing CH-47 Chinook at Camp Grayling Joint Maneuver Training Center, Michigan, during exercise Northern Strike 17, Aug. 2, 2017. The high-altitude, high-opening (HAHO) parachute insertion method allows Marines to covertly insert themselves onto the battlefield to conduct reconnaissance, acting as the eyes and ears for the commander. Soldiers with 3-238th provided a Chinook for U.S. Reconnaissance Marines with Echo Company, 4th Reconnaissance Battalion, 4th Marine Division, Marine Forces Reserve, doing static-line jumps. (U.S. Marine Corps photos by Lance Cpl. Niles Lee)