A Mandaean worshipper performs religious rituals in the Tigris river on the first day of the Benja festival in Baghdad March 17, 2010. 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/Thaier al-Sudani (IRAQ - Tags: RELIGION SOCIETY)