Americans Mock Canada After National Anthem Booed Twice

Americans quickly took to social media to express their outrage after Canadian hockey fans booed the U.S. national anthem.

During a Canada-U.S. matchup in the NHL-run 4 Nations Face-Off tournament in Montreal, spectators booed as David Grenon of the Royal Canadian Air Force Band began a rendition of the "Star Spangled Banner," before joining in a chorus of their own national anthem, "O Canada.