Shiite Muslim women attend the festival of Arbaeen, one of the holiest days in their religious calendar at the Imam Abbas shrine in the holy city of Karbala, Iraq, Thursday, Feb. 4, 2010. A bomb planted on a parked motorcycle ripped through a crowd of Shiite pilgrims Wednesday, killing at least 20 people and wounding more than 100, officials said. (AP Photo/Hadi Mizban)
