The Royal Barge sails on the Chao Phraya river during the 60th anniversary celebrations of the Thai King in Bangkok. Kings and queens, sultans and princes from 25 countries gathered in Thailand to celebrate 60 years on the throne for King Bhumibol Adulyadej, the world's longest-reigning monarch. (AFP/Pornchai Kittiwongsakul)

Oarsmen row the barges on the Chao Phraya river past the Grand Palace, on Monday June 12, 2006, during the celebrations of Thai King Bhumibol Adulyadej's 60th year on the throne. Royals and dignitaries paraded into Thailand's throne hall Monday to honor the world's longest serving monarch, Bhumibol Adulyadej, as he marks 60 years since he became the Thai king. More than 2,000 oarsmen row 52 ornate boats down the river in a procession 1,200 meters (yards) long and 90 meters (yards) wide, in one of the most widely anticipated events of the five-day celebration honoring the king. (AP Photo/Sakchai Lalit)

The Suphannahongse Royal State Barge cruises past the Grand Palace along the Chao Phraya river on Monday June 12, 2006, as a part of the celebrations of Thai King Bhumibol Adulyadej's 60th year on the throne. (AP Photo/Sakchai Lalit)