RUMFORD, Maine — Eighteen athletes braved Wednesday’s brutal temperatures and wind to kick off the 2012 U.S. Adaptive Cross Country Championships with the 0.8 k sprints at Black Mountain. The number of competitors was likely a record, according to U.S. Paralympics High Performance Nordic Director John Farra. “Some of them are just developing some of them are racing World Cups and finishing in the top ten,” Farra said. “We’re really developing as a nation and...