A monk leads drug addicts through the smoke from a grass fire to a steam bath at the Tham Krabok monastery in Thailand's Saraburi province May 14, 2007. The obscure Buddhist monastery, which advocates a secret herbal potion and ritual vomiting for drug addicts, has become the final source of hope for thousands of Thais and Westerners. Picture taken on May 14, 2007. To match feature THAILAND/REHAB REUTERS/Chaiwat Subprasom (THAILAND)