BANGKOK, THAILAND - DECEMBER 05: Thailand's King Bhumibol Adulyadej leaves the Siriraj Hospital to go to The Grand Palace on December 5, 2011 in Bangkok, Thailand. King Bhumibol is celebrating his 84th birthday today and is Thailand's longest serving monarch, having reigned as King since 1946. (Photo by Athit Perawongmetha/Getty Images)
