They've saved the best for last. The U.S. and Canada will face off in men's hockey Sunday, providing Olympics fans with one of the biggest contests of the Winter Games on the last day of competition. For Canada, no gold medal would be sweeter. "We've been building up for this for years," said one Canadian player. The U.S. hasn't won gold in hockey since Lake Placid 30 years ago. "It's unbelievable the amount of excitement that's going on back in the U.S. right now about our team," American Ryan Callahan said. The puck drops at 3:15 EST.