Team USA's John Carlson (4), Ryan Callahan (24) and David Backes (42) clear Canada's Chris Kunitz (14) from in front of Team USA's goalie Jonathan Quick during the second period of their men's ice hockey semi-final game at the Sochi 2014 Winter Olympic Games February 21, 2014. REUTERS/Brian Snyder (RUSSIA - Tags: SPORT ICE HOCKEY OLYMPICS)