U.S. Air Force Airmen, participating in the three day Port Dawg Challenge, exit a C-17 Globemaster III, a day prior to the start of the competition, June 15, 2015. The Port Dawg Challenge was created to enhance and maintain the camaraderie, espirt de corp and prestige of Aerial Port Airmen while promoting professionalism, leadership, training and communication between "Port Dawgs." (U.S. Air Force Photo by Senior Airman Josh Slavin/Released)