U.S. Air Force Lt. Col. Christopher Bennett, second from right, Headquarters Air Force Reservist Directorate, Air Staff, Pentagon, chief of airlift and tanker requirements, prepares to cross the finish line of the Alexander the Great half-marathon on Father's Day, June 16, 2013, at Stanwick Lakes, Northamptonshire, England. As part of a family tradition, Bennett's children - from left to right, Emma, 9; Ashton, 2; Katie Reed, 15 and Elijah, 10 - run with their dad every Father's Day. As he was running the half-marathon, and his two eldest children were running the 5 km race at the same location, all four children waited near the end of the race, hopped on the trail and ran to the finish line with him. Bennett recently completed his goal of running "20 13s" in 2013 - 20 half-marathons, the majority of which he ran while stationed at RAF Mildenhall in England. (Courtesy photo by Molly Bennett/Released)