Al Gore: One of the greatest gifts of our democracy is the opportunity it offers us every four years to change course. It's not a guarantee; it's only an opportunity. The question facing us, simply put, is will we seize this opportunity for change? That's why I came here tonight: to tell you why I feel so strongly that we must seize this opportunity to elect Barack Obama president of the United States of America. Eight years ago, some said there was not much difference between the nominees of the two major parties and it didn't really matter who became...