TODAY   |  November 12, 2012

‘Doomsday preppers’ get ready for extreme disaster

A growing movement of people are stockpiling guns, fuel, and water and running drills in case of an attack or other catastrophe. NBC’s Janet Shamlian reports on one family featured on the National Geographic show “Doomsday Preppers.”

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This content comes from Closed Captioning that was broadcast along with this program.

>> and devastated communities here in the northeast, but there's a growing movement of people preparing for something even bigger. nbc's janet shamlian introduces us to the doomsday preppers.

>> let's have a family meeting.

>> reporter: as a father of six braxton southwick wants to make sure his family is safe at his home near salt lake city and takes his safety very seriously. for nearly a decade the family has been preparing for a biological terror attack .

>> boys, i want you to get your guns.

>> reporter: they have regular drills to make sure they know exactly what to do if disaster strikes.

>> i want it fast. you guys ready?

>> yes.

>> let's do it.

>> grab the charcoal.

>> reporter: inside the southwick home more than a dozen guns, chemical suit, masks, hundreds of gals of water, gas and diesel fuel and enough food and supplies to last a year.

>> this is doomsday preppers.

>> reporter: southwicks are part of a new season of "doomsday preppers" on the national geographic channel .

>> a lot of people think if you're a prepper you're crazy, and it's just not true. there's so many families like us.

>> just like going up an attic except going down, it's in reverse.

>> reporter: so many families. ron hubbard is able to make a living selling underground disaster cellars also known as doomsday punkers. there's a lot of secrecy in the punker business. i can't even tell you where this one is except to say it's somewhere deep in the heart of texas .

>> the shelt worry add about $500 to the cost of a new home.

>> reporter: a blast from the past when films like this encouraged americans to prepare for the worst. they are a lot pricier now, running anywhere from $10,000 to more than a million. this one is about the size of an 18-wheeler, has its own air filtration system and runs on batteries or a generator with enough power to last at least a week. some features aren't exactly necessity.

>> got a 46-inch big-screen tv, a leather couch that reclines so can i lay back and watch my football when i have my satellite dish on, got my refrigerator, microwave.

>> reporter: hubbard says business is booming with customers who want to be protected.

>> we'll definitely be better prepared to execute our game plan and be able to get through whatever gets thrown at us.

>> reporter: years of planning, insurance against the unknown. for "today," janet shamlian , nbc news, houston.

>> and "doomsday preppers" premiers tomorrow night on the national geographic