The Bible is pretty clear about doomsday prophecies: "But of that day and that hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father," reads Mark 13:32. But that hasn't stopped some believers from trying to make predictions anyway. One such man is Harold Camping, a retired engineer who believes that the Bible is a numerical code book that can be deciphered to reveal clues about the end times. Camping, the founder of the independent ministry Family Radio International first predicted that the world would end in September 1994. But when the apocalypse failed to materialize, he attributed the error to incomplete research.
Camping recently gained additional attention for his latest doomsday prediction: May 21, 2011. In an interview with New York Magazine on May 11, 2011, the 89-year-old was brimming with confidence, saying, "God has given sooo much information in the Bible about this, and so many proofs, and so many signs, that we know it is absolutely going to happen without any question at all." Camping was so certain that his ministry spent millions of dollars plastering the Judgement Day message on more than 5,000 billboards and 20 recreational vehicles as a warning to the general public. When May 21 came and went without interruption, Camping did what any good doomsayer would -- he blamed the mistake on a mathematical error and moved the date back to October 21.