U.S. Air Force Security Forces military working dog handlers take part in the Air Education and Training Command Defender Challenge team tryout at Joint Base San Antonio-Medina Annex, Texas, Jan. 28, 2020. The five-day selection camp includes a physical fitness test, M-9 and M-4 weapons firing, the alpha warrior obstacle course, a ruck march and also includes a military working dog tryout as well. A total of 27 Airmen, including five MWD handlers and their canine partners, were invited to tryout for the team. The seven selectees to the AETC team will represent the First Command at the career field’s world-wide competition that will be held at JBSA-Camp Bullis in May 2020. (U.S. Air Force photo by Sarayuth Pinthong)