11.   Security planners say there have been no credible threats directed against the games.

12.   Security planners have tried to keep much of the protection as unobtrusive as possible.

13.   The chug of freight trains is resonating among Olympic security planners, who are concerned about risks on a major rail line that is near three key competition venues.

14.   There is evidence that security planners have been thorough.

15.   They include chemical and biological warfare specialists, terrorism analysts, security planners and computer network experts.

16.   Utah Olympic Public Safety Command director Robert Flowers said the attacks will force Olympic security planners to re-evaluate their preparations but will not necessarily force changes.