>I'll be very curious to know if this story is indeed true:
>http://www.express.co.uk/news/world/619447/Paris-terrorist-Syrian-refugee-Greece-government-official
>
>I am certain that it is quite true. Although I am not a big fan of Rush Limbaugh, he predicted this when Europe first began accepting Syrian refugees.

But how to cope with such a danger clearly visible? Pin the electronic equivalent of a yellow star on them? Probably refugees would not object, but from historic POV hard to argue for over here. Create a vetting network here? Should be possible to at least start quickly and with swarm idea might actually be helpful using pictures of those going through official entry points, but within a few weeks terrorists would avoid official entry. Spying on own population also has bad aftertaste from WWII and east german times