we would take your word for it henri murison, he always . for it henri murison, he always takes me backhing are on the uk. bbc news. welcome back. it is time for the security brief it is just over a week since hts and rebel fighters arrived in damascus. a week since the syrian army abandonned its positions, leaving a security vaccum behind. the rebels sought to fill some of that space, but their numbers are minimal, and their capacity to co—ordinate matters in the major cities in the west, as well as a complex desert campaign in the east is limited at best. we don't talk about much about the renewed isis threat in syria. but by some conservative estimates, islamic state have conducted hundreds of attack in syria since january — over double the number of last year. us forces responded in the last week, hitting more that 75 isis targets throughout central syria. there's an awful lot we don't know about the security situation in different parts of the country, so it is a good time to take stock. to consider the risks the country is now facing. back with us tonight, our resident security ex