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TIKRIT, IRAQ - MARCH 09: An injured member of Iraqi forces walks with the help of his friends during clashes between Iraqi army forces, supported by Shiite militias, and Daesh (Islamic State of Iraq and the Levant) in Tikrit, Iraq on March 09, 2015. (Photo by Ali Mohammed /Anadolu Agency/Getty Images)

TIKRIT, IRAQ - MARCH 09: An injured member of Iraqi forces walks with the help of his friends during clashes between Iraqi army forces, supported by Shiite militias, and Daesh (Islamic State of Iraq and the Levant) in Tikrit, Iraq on March 09, 2015. (Photo by Ali Mohammed /Anadolu Agency/Getty Images)