Volunteers who have joined the Iraqi Army to fight against the predominantly Sunni militants, who have taken over Mosul and other Northern provinces, chant slogans as they travel in an army truck, in Baghdad

Volunteers who have joined the Iraqi Army to fight against the predominantly Sunni militants, who have taken over Mosul and other Northern provinces, chant slogans as they travel in an army truck, in Baghdad, June 12, 2014. Since Tuesday, black clad ISIL fighters have seized Iraq's second biggest city Mosul and Tikrit, home town of former dictator Saddam Hussein, as well as other towns and cities north of Baghdad. They continued their lightning advance on Thursday, moving into towns just an hour's drive from the capital. REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY) - RTR3TDXG