Senior Airman Michael Terrazas, 30th Security Forces Squadron conservation patrolman, does arena work with Military Working Horse "Buck" Feb. 21, 2019, at Vandenberg Air Force Base, Calif. Arena work is done to practice maneuvers, keep the horses exercised, and to ensure the horses and patrolmen are working well together before going out into the field. (U.S. Air Force photo by Airman 1st Class Hanah Abercrombie)