Britain's Prince William checks the sharpness of a Canadian Ranger knife while with his wife Catherine, Duchess of Cambridge, at Blatchford Lake, Northwest Territories July 5, 2011. The Prince and his wife Catherine are on a royal tour of Canada from June 30 to July 8. [Photo/Agencies]

Villagers stand around a 15-feet (4.5-metre) long dead adult humpback whale as it lies on the beach after being washed ashore at Toluca beach, 50km (31 miles) south of San Salvador July 5, 2011.The Ministry of Environment and Natural Resources (MARN) reported Tuesday the whale arrived at the beach alive but probably sick. It died later in the day and was buried in the dunes on the beach. The cause of death was not known. [Photo/Agencies]