I remember reading a short story which featured a man who was involved in a time war. He and many others were pulled from major disasters just before their deaths, and brought into the fight.
The enemy had wised up to this, and was preventing these disasters, meaning the 'heroes' of the war had to ensure such things happened 'as scheduled'.
All of this is told to the point-of-view character by a suspected terrorist holding some device. At the end of the story, he releases the device and disappears.
The story ends with the main character talking about how nothing had happened that day, heading towards the World Trade Center.
Anyone know what the story is?