ISIS reportedly torches oil fields to slow Tikrit attack

About 20,000 Iraqi army troops, Shiite militia members, and Iranian advisers are advancing on Tikrit, in Iraq's largest effort to retake a city from Islamic State control. ISIS is staging counter-attacks and, sources tells Reuters, setting fire to oil fields about 20 miles northeast of Tikrit to slow the assault. Torching the Ajil oil field, ISIS apparently believes, will protect them from Iraq military helicopters. Before ISIS conquered Tikrit last August, the Ajil field produced about 25,000 b...