Active shooter exercise keeps Travis prepared Published Jan. 30, 2017 By Louis Briscese 60th Air Mobility Wing Public Affairs TRAVIS AIR FORCE BASE, Calif. -- Service members from David Grant USAF Medical Center participate in an active shooter exercise at Travis Air Force Base, Calif., Jan. 26, 2017. The exercise evaluated the medical staff’s lock down response and patient care procedures. (U.S. Air Force photo/Louis Briscese)