talk of the last few days has been about toothpaste bombs, but that sophisticated technique isn't really what's going to be bothering people on the ground here for the past few months. this is a region of the world where explosives are pretty common when you're away from the ring of steel near here in sochi and there are concerns about how well you can implement a dagnet across this whole region given the state of the russian police force often seen by russians as being a net being corrupt and actually with brutal tactics that many accuse of having fueled the insurgency here in first place, wolf. >> nick paton walsh on the ground for us in sochi. nick, thanks very much. still ahead, cnn's rachel nichols is also in sochi right now. she's standing by to join us live. she'll tell us how the u.s. olympic team is responding to all these terror warnings out there and whether it's throwing them off their game. and we'll take you inside the hotels in sochi where so many of the rooms are simply unfinished at best and some of them are pretty disgusting.