TIKRIT, IRAQ - MARCH 26: Smoke trails over as Iraqi security forces and al-Hashid al-Shabi forces attack against Daesh (Islamic State of Iraq and the Levant) in Tikrit, Iraq on March 26, 2015. (Photo by Ali Mohammed /Anadolu Agency/Getty Images)
TIKRIT, IRAQ - MARCH 26: Smoke trails over as Iraqi security forces and al-Hashid al-Shabi forces attack against Daesh (Islamic State of Iraq and the Levant) in Tikrit, Iraq on March 26, 2015. (Photo by Ali Mohammed /Anadolu Agency/Getty Images)