Fighters from the Iraqi Imam Ali Brigade, take part in a training exercise in Iraq's central city of Najaf on March 7, 2015, ahead of joining the military operation in the city of Tikrit. Some 30,000 Iraqi security forces members and allied fighters launched an operation to retake Tikrit at the beginning of March, the largest of its kind since Islamic State (IS) group forces overran swathes of territory last June. AFP PHOTO / HAIDAR HAMDANI (Photo credit should read HAIDAR HAMDANI/AFP/Getty Images)
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AFP HAIDAR HAMDANI