we want to bring in nbc news terrorism analyst evan coleman joining us via skype. >> good afternoon. >> jim touched on the efforts russia has gone through to try to secure sochi and thousands of cameras and security perimeter is huge. snipers in the mountains and a lot of people are very nervous. put it in perspective from your view how nervous people should be about traveling here. >> well, look, there are obvious concerns. we see the last few days what's going on with the chechens and we have a window into that since the boston bombings in the u.s. i think people now recognize there are groups there that are really looking to threaten russia and see this as an opportunity to make a public statement on the world scene. that's not the only threat. let's not forget russia has become em broiled in the syrian conflict. in the last few weeks we saw a drone strike take place in yemen where a senior al qaeda leader in yemen was killed alongside a russian militant. there's a lot of different indications here suggesting that there are legitimate concerns. >> in terms of -- it's been pretty well doc