Shi'ite Muslims attend Friday prayers at the Imam Hussein shrine in the holy city of Kerbala, June 13, 2014. Iraq's most senior Shi'ite Muslim cleric urged followers to take up arms against a ... more 
Shi'ite Muslims attend Friday prayers at the Imam Hussein shrine in the holy city of Kerbala, June 13, 2014. Iraq's most senior Shi'ite Muslim cleric urged followers to take up arms against a full-blown Sunni militant insurgency to topple Shi'ite Prime Minister Nuri al-Maliki, escalating a conflict that threatens civil war and a possible break-up of the country. In a rare intervention at Friday prayers in the holy city of Kerbala, a message from Grand Ayatollah Ali al-Sistani, who is the highest religious authority for Shi'ites in Iraq, said people should unite to fight back against a lightning advance by militants from the radical Islamic State of Iraq and the Levant. REUTERS/Mushtaq Muhammed (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) less 
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Reuters | Photo By STRINGER/IRAQ / REUTERS
Fri, Jun 13, 2014 1:15 PM EDT