U.S. Air Force Senior Airman Joshua Pravel, 86th Maintenance Squadron C-130J Super Hercules crew chief, wears mission-oriented protective posture gear during Exercise Operation Varsity 19-01 on Ramstein Air Base, Germany, Feb. 28, 2019. During the exercise, participants stayed in a protective shelter until given the all clear. (U.S. Air Force photo by Senior Airman Devin M. Rumbaugh)