U.S. Air Force Staff Sgt. Tiffany McGregor, 86th Aerial Port Squadron Port Dawg Challenge participant, operates a forklift through an obstacle course at Dobbins Air Reserve Base, Ga., June 18, 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)