BAGHDAD (Reuters) - Using secret tunnels built by Saddam Hussein and rough terrain to outfox Iraqi troops, Islamic State insurgents are getting dangerously close to Baghdad with the support of heavily-armed Sunni tribesmen, Iraqi security and intelligence officials said.
The al Qaeda offshoot, which poses the biggest security threat to Iraq since the fall of Saddam in 2003, has made new bold advances in the north, reaching a major dam and seizing a fifth oilfield and three more towns after routing security forces from the Kurdish autonomous region.