Petter Northug of Norway skis to win the World Cup cross-country skiing 4km free individual race in Oberhof, December 29, 2012. REUTERS/Thomas Peter (GERMANY - Tags: SPORT SKIING Stock Photo - Alamy
OakleySkiing on Instagram: “Petter Northug (@jantelov1) won four gold medals at the FIS World Championships in Falun, Sweden. He now has 13 career world champio…