What is so-called Islamic State's strategy for women? The BBC's Security Correspondent Frank Gardner investigates

Whitehall officials have told the BBC that contrary to recent announcements, the number of Britons emigrating to Syria to live under Islamic State rule peaked two years ago. However, the proportion of women amongst those joining the extremist group has risen dramatically. So what's behind this and what exactly is the IS strategy behind luring women into their ranks? The BBC's Security Correspondent Frank Gardner investigates. #BBC #ISIS #BBCR4Today