Who Wins Call of duty 4 modern warfare?

I have played the game and beat it and Love it but I have always pad more attention to what me and my friends are talking about in chat then the Game...I know A Nuke goes off in the Mid east, that dosn't Mean the U.S. Lost because they stopped the Russians and the British cought Ala-sade so...do the U.S. and U.K. win?