Well, the relationship with Britain might not have broken down. I know it seems ridiculous that anything could have prevented the break of '87, but without the close relationship between President Thatcher and Prime Minister Reagan, the two countries wouldn't have coordinated as closely, meaning the Green plans wouldn't have existed, and thus been disastrous for the British when they were leaked to the Indians. Preventing the destruction of Manchester might have saved San Fransisco, too, and California might still be inhabited.
I also think the Unified Israeli/Palestinian government might have lasted far less than the 30 years (and counting) it has in our world. The destruction of East Jerusalem via French dirty bomb did quite a bit to unify the Israelis and Palestinians, and the war that followed did even more. On the same note, Paris probably would still be around instead of a radioactive crater. Of course, that would mean the 1988 olympic games in Lyon wouldn't have ended with fully half of the IOC getting cancer, and we might still have a horribly corrupt bureaucracy running the games.