It took a week, but winter has finally returned to Rumford, ME. In the last two days at the 2011 U.S. National Championships, the tropical climate that dogged organizers has departed, replaced by temperatures far below freezing. With distance skate races on tap for Thursday, the 2.7-kilometer loop at Black Mountain has been widened in spots, augmented by snowmaking and shoveling. The men and women will be doing 11 and seven laps, respectively, for a total...