Tunnel Network Used by ISIS Uncovered in IraqNetwork of tunnels used by ISIS were found in Sinjar, Iraq, after the Kurdish fighters took back control of the town.A tunnel used by Islamic State militants is seen in the town of Sinjar, Iraq December 1, 2015. STRINGER/IRAQ / ReutersLink copiedDec. 4, 2015, 7:37 PM UTC / Updated Dec. 4, 2015, 7:37 PM UTC