A cloud of smoke rises from an oil pipeline in Tikrit, north of Baghdad, April 17, 2014. A rusting pipeline that runs from the Kirkuk oilfields to the Baiji refinery in Salahuddin province leaked a ... more 
A cloud of smoke rises from an oil pipeline in Tikrit, north of Baghdad, April 17, 2014. A rusting pipeline that runs from the Kirkuk oilfields to the Baiji refinery in Salahuddin province leaked a large amount of oil into the Tigris River, according to a Northern Oil Company official who asked not be named. The spill stirred panic after someone set the oil ablaze, sending huge clouds of smoke into the provincial capital Tikrit, according to city residents. Ambulances evacuated residents with difficulty breathing. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS) less 
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Reuters | Photo By STRINGER/IRAQ / REUTERS
Thu, Apr 17, 2014 4:27 PM EDT