A Mandaean priest baptises a worshipper in the Tigris river during the Benja festival in Baghdad March 21, 2011. Benja is a five-day religious holiday celebrated by Mandaeans, a monotheistic religion historically practised around the lower Euphrates and Tigris, and the rivers surrounding the Shatt-al-Arab waterway, part of southern Iraq and Khuzestan Province in Iran. REUTERS/Mohammed Ameen (IRAQ - Tags: RELIGION SOCIETY)