If Norad or the US air force didn't have real-time tracking of the UARS as it approached the west coast last night, you've got to wonder if they have any real ability to detect a ground or submarine-launched russian or chinese ICBM in a similar manner.
After all, then had precise time and position information as to where this thing should have been.
They are claiming that it came down in the pacific ocean. Obviously they have no real ability to detect this relatively large object, with a shape that is probably ideal to detect with radar (as opposed to a streamlined missle).