Thailand's Prime Minister Surayud Chulanont (centre L) holds candles in front of the Grand Palace in celebration of Thai King Bhumibol Adulyadej's 80th birthday in Bangkok December 5, 2007. Thailand's revered king called for national unity on Wednesday at joyous celebrations on the 80th birthday of the world's longest reigning monarch. REUTERS/Sukree Sukplang (THAILAND)