An Iraqi police officer uses a bomb detector device, at a checkpoint in central Baghdad, Iraq, Thursday, May 16, 2011. Iraqi government has tightened its security measures while Shiite militia ... more 
An Iraqi police officer uses a bomb detector device, at a checkpoint in central Baghdad, Iraq, Thursday, May 16, 2011. Iraqi government has tightened its security measures while Shiite militia fighters led a massive rally of followers of a hard liner anti American cleric on Thursday, marching in Baghdad in a show of defiance as Iraqi leaders weigh whether to keep U.S. troops in the country beyond the end of the year. less 
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Associated Press | Photo By Khalid Mohammed
Thu, May 26, 2011 6:08 AM EDT