BEIRUT (Reuters) - Islamist militants linked to al Qaeda entered Idlib in **rthern Syria on Monday and opened up a new front in a city that has been controlled by President Bashar al-Assad's forces for more than a year, both sides said. State television said the Nusra Front militants infiltrated Idlib at dawn and were confronted by troops and pro-government militias. The Nusra Front said its fighters killed dozens, including ******rs, in the attack and seized buildings. ...