in a mosque and most recently in 2012. an attack on five policemen in dagestan carried out boy a black widow. the concern that these black widows are ready to strike key olympic sites. this is the greater sochi area. the ring of steel we keep talking about. the intense low monitored perimeter and when you start to zoom in. this is the cluster. this is sochi. right along the coast here, this is where the athletes will be housed. when you push further north, you see the mountains up here. a lot of the skiing events are being held up there. all of these sites are soft targets authorities believe these black widows may have breached that ring of steel and are embedded in the ring of steel. the author of the world's most dangerous places. robert, welcome back. >> thank you. >> let's begin with just