Command Sgt. Maj. Nelson Callahan, Joint Task Force-Bravo Command Sgt. Maj., swings a sledge hammer into a tire for strength training June 03, 2015, at Soto Cano Air Base, Honduras. During his year at Soto Cano, CSM Callahan has used his famous “Sgt. Maj. PT” sessions to strengthen JTF-B physically and as a team (U.S. Air Force photo by Capt. Christopher Love).