Shi'ite pilgrims wave to an Iraqi policeman as they return to Baghdad after attending a religious rite in Kerbala February 16, 2009. Exhausted after days of sleeping rough, thousands of Iraqi Shi'ite pilgrims neared the end of a major rite on Monday, and prepared for long treks home during which they might again be vulnerable to attack. REUTERS/Thaier al-Sudani (IRAQ)