OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) ascend a cave wall during the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)

OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) crosses a chasm using a Tyrolean rope bridge during the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)

OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) train on a rock-climbing wall during the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)

OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) prepares a rope bridge during the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)

OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) prepare an anchor for a Tyrolean rope bridge the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)

OKINAWA, Japan - U.S. Army Green Berets with 1st Battalion, 1st Special Forces Group (Airborne) climb an ocean side rock face during the Basic Military Mountaineering Course held Sept. 7-16, 2021. During the course, Soldiers develop skills ranging from tying basic knots to practicing Tyrolean traverse methods throughout varying terrain and obstacles. (U.S. Army Courtesy Photo)