that's for you kevin wamsley. >> well generally it pays off in a number of different ways. it can be a good way to bring citizens of the nation together, it can be a great part of constructing national identity much. it's a feel good event. they can feel proud in terms of hosting the game but financially that's another story. historically let's only been one olympic games that's turned to profit and that's los angeles in 1984. all other olympic games have come at a tremendous cost to the public purse and to the corporations who sponsor the owe level pick games. >> ifill: steve wilson are tickets been told and do these questions about security affect that at all. >> i don't think it affects ticket sales. organizers have hoped to sell out these games and they've done a pretty good job of that however they admitted yesterday in fact that they haven't. in fact, half a million tickets for the soccer tournament have been withdrawn because they couldn't sell them. and there's still several hundred thousand tickets yet on the market for football, for soccer and for other events. so