The world may be ending, but that's no reason to fret! Be prepared, instead! (That's so catchy we ought to trademark it). Meet the Doomsday "Preppers," survivalists who prepare for the coming Apocalypse and, in some cases, profit at the same time:

"There's a lot of different things that could happen," Ralston said. "For me, I look at prepping as kind of like insurance. You have car insurance, health insurance, life insurance."

Call it Apocalypse insurance. Ralston turned his family's two-car garage into a staging area. Inside is a trailer, which he keeps packed and ready to go at all times, stockpiles of freeze-dried food, including cartons of canned chicken with a shelf life of 15 years, survival gear, such as a system for purifying polluted water, first aid kits and lots of weapons and ammunition. His son has his own AK-47.

"In the beginning, my wife really wasn't on the same page as I was," Ralston said. "But in reality, the more information I started to give to her, it opened up her eyes to the other potential threats that are out there."

ABC's Nightline has more: Link (Warning: auto-start video)  | National Geographic series about it: Doomsday Prepper