Originally Posted by Bill O'Rights

Maybe. Maybe not. Look at it this way. If I went back in time to prvent John Kennedy from being assasinated, and was succesful...you'd never know about it because the assasination never happened and Kennedy went on to do whetever it was that he would do. That then becomes the new history. You wouldn't know anything different. Or...what if we faced another Cuban Missile Crises type situation? What if this time the misiles launched? What if...someone went back in time to facilitate Kennedy's assasination in order to prevent a nuclear holocaust? What if worms had machine guns? Birds wouldn't mess with 'em.