In this Sunday, Feb. 24, 2013 photo, an Iraqi policeman walks past a sign showing Shiite religious leaders and Shiite's who were killed during a fight between US troops and al-Mahdi Arm

 

              In this Sunday, Feb. 24, 2013 photo, an Iraqi policeman walks past a sign showing Shiite religious leaders and Shiite
In this Sunday, Feb. 24, 2013 photo, an Iraqi policeman walks past a sign showing Shiite religious leaders and Shiite's who were killed during a fight between US troops and al-Mahdi Army militia in the Jihad neighborhood of west Baghdad, Iraq. The fliers claiming to be from a new Iranian-linked Shiite militant group began turning up last week in front of Iraqi Sunni households bearing a chilling message: Get out now or face "great agony" soon. (AP Photo/ Karim Kadim)