Q: How many will be Raptured?
A: Campbell estimates 200 million. The remaining nearly 7 billion face a grisly fate - crushed in the quake, burned by sulfur, turned into pillars of salt, etc.
Q: Why May 21?
A: Camping calculates May 21 is exactly 7,000 years from the date of the Noah's Ark flood. In his book "Time Has an End," Camping writes. "The year 391 B.C. is the year when the Old Testament was finished, and 2,011 + 391 - 1 = 2,401, or 7 x 7 x 7 x 7." There you have it.
Q: Any other reason?
A: Yes. Gay Pride and same-sex marriage. Camping says God will punish America and the rest of the world for Gay Pride and same-sex marriages, just as Sodom and Gomorrah were punished with fire and brimstone in the Old Testament.