up to 6,000 extremists have travelled to iraq and many of them joining isis. hundreds and hundreds have returned to europe. they're really stretching security services thin. my understanding is that he was on the radar screen and the gunman of the security agencies and including the belgium authorities and he spent time there and believed to have conne connected. we have seen more than 300 extremists travel to iraq and more than a hundred back he said that in the last two years there have been more people charged with terror offenses in the country than in the 30 years before that.