In case it is not enough - I'll make a plain statement. Harold Camping is a false prophet who has now wrongly predicted that the world would end in 1994, on May 21st, 2011, and now on October 21st, 2011.
Also let me remind you that Scripture says that NO MAN KNOWS THE DAY OR THE HOUR of Christ's coming. That includes Harold Camping or any other prophetic goober who is foolish enough to put a date on that event. Here is what Scripture says. First - it is coming soon. Second - be ready.