U.S. Air Force Senior Airman Bobby Chambers, a student attending the Engineering Installation vehicle training class, operates a John Deere dozer Dec. 13, 2017, at the Air National Guard Schoolhouse, Fort Indiantown Gap, Pennsylvania. The two-week long EI vehicle training class provided EI Airmen with the opportunity to train on six different excavating vehicles. (U.S. Air National Guard photo by Staff Sgt. Tony Harp/Released)