PREMIUM -- Britain's Prince Charles and his wife, Camilla, the Duchess of Cornwall look at the Liberty Bell in the center of Philidelphia, U.S. Saturday Jan. 27, 2007. The Prince and Duchess arrived in the US Friday, and will travel by train to New York City on Sunday where the Prince will receive the award of Global Environmental citizen, from former US vice president Al Gore. (AP Photo/ Arthur Edwards, Pool)