Security Forces Airmen take part in the run portion of a physical fitness test as the opening day of the Air Education and Training Command Defender Challenge team tryout at Joint Base San Antonio-Lackland, Texas, Jan. 27, 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.