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TIKRIT, IRAQ - MARCH 05: Some of the Iraqi security forces and Shia militias rest as others stage attacks against Daesh (Islamic State of Iraq and the Levant) members with heavy and light weapons to recapture the Tikrit City, Iraq on March 05, 2015. (Photo by Ali Mohammed/Anadolu Agency/Getty Images)

TIKRIT, IRAQ - MARCH 05:  Some of the Iraqi security forces and Shia militias rest as others stage attacks against Daesh (Islamic State of Iraq and the Levant) members with heavy and light weapons to recapture the Tikrit City, Iraq on March 05, 2015. (Photo by Ali Mohammed/Anadolu Agency/Getty Images)