Mumbai, INDIA: Hindu dalits pray during a mass conversion to Buddhism ceremony in Mumbai, 27 May 2007.  Thousands of low-caste and tribal Hindus, seeking freedom from oppression in India's heirarchy-ridden caste system, embraced Buddhism in a mass conversion. It is estimated that close to five thousand dalits - who are on the bottom rung of India's anicent caste hierarchy - would have converted to Buddhism during the simple ceremony during which the people recite hymns read out by the monks, following which they are accepted as Buddhists.   AFP PHOTO/ Sajjad HUSSAIN (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)