A margin as thin as an ax blade separates frontrunners Allen Moore and Hugh Neff as they play leapfrog in the too-close-to-call Yukon Quest International Sled Dog Race — the outcome of which could, in fact, be decided by an ax blade.Hugh Neff of Tok was given a 30-minute penalty this morning when he reached the checkpoint at Pelly Crossing, Yukon, without an ax, one of the pieces of mandatory gear mushers are required to carry in the 1,000-mile race from Fairbanks to Whitehorse.Read more here: http://www.adn.com/2012/02/12/2313813/neff-moore-duel-for-yukon-quest.html