You have to kill the guard standing at the edge without the other seeing you, once you do that walk to the edge and you should be able to drop down on the edge, crawl over and disable the bomb. That last code combination is the hardest of the four bombs on the bridge s you really have to pay...
I'm glad that I only paid 99 cents for Splinter Cell because it was a very short game. I beat the game in about two days or so. Still a good game though. I'm waiting on the next game loft sell.
Be blessed, @LovedbyGod_1 Sent from my iPad using iPF