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TIKRIT, IRAQ - MARCH 05: Iraqi security forces and Shia militias 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: Iraqi security forces and Shia militias 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)