U.S. Air Force Col. Brett Clark, 94th Airlift Wing commander, briefs the contestants of the Port Dawg Challenge during the opening ceremony at Dobbins Air Reserve Base, Ga., June 16, 2015. The Port Dawg Challenge was created to enhance and maintain the camaraderie, esprit de corps 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)