see more

TIKRIT, IRAQ - MARCH 31: Iraqi security forces and Shiite militas are seen as they rest during an operation against Daesh (Islamic State of Iraq and the Levant) terrorist to capture the city, in Tikrit, Iraq on March 31, 2015. (Photo by Ali Mohammed/Anadolu Agency/Getty Images)

TIKRIT, IRAQ - MARCH 31: Iraqi security forces and Shiite militas are seen as they rest during an operation against Daesh (Islamic State of Iraq and the Levant) terrorist to capture the city, in Tikrit, Iraq on March 31, 2015. (Photo by Ali Mohammed/Anadolu Agency/Getty Images)