John Walters Jr., Warrior Fitness instructor, instructs 2nd Lt. Natasha Mosquera, 436th Airlift Wing Public Affairs chief of media operations, on proper form during a stretching exercise May 16, 2019, at the Fitness Center on Dover Air Force Base, Del. Walters is one of two Warrior Fitness instructors who teach the free class on Tuesdays and Thursdays at 5:30 p.m. (U.S. Air Force photo by Roland Balik)