Matthew McLean, Michael Klueh, Conor Dwyer and Ryan Lochte (L-R) of the Unites States sing their national anthem during the awarding ceremony of the men's 4X200m freestyle relay at the 11th FINA World Swimming Championships in Istanbul, Turkey, on Dec. 13, 2012. The United States won the gold with 6 minutes and 51.40 seconds. Xinhua photo