Damnit I hate it when filmmakers do that, and what makes it even worse, is that Tom Clancy was the Executive Director.
As an avid reader of Tom Clancy's work, I have read Sum of all fears several times.
And I am sorry to say that this has to be one of the worst pieces of cRap that has come out of hollywood that has been based on a novel/book/game/superhero in a DAMN long time.
I guess from a cinematic point of view, it is a good movie - if you try to put aside the the fact that about the only thing that is even remotely like the book, is that there is a nuke that goes off in a football game.
Oh and the name.
Well without spoiling it for the rest of you. I will stop, but I must warn you, that if you have read and enjoyed the book as I have - steer clear of this one. cause it really sucks.