built numerous missile silos in secret locations

across the country.

Many sit empty and useless today.

But there's one in an undisclosed location

north of Wichita, Kansas,

that has taken on a new purpose.

Welcome to the $3 million doomsday-proof condo.

Larry Hall: It's not the luxury that drives the cost,

it's the caliber of the infrastructure

and the threats you're protecting against,

and, most importantly,

the duration that you can be off-grid for.

Narrator: It's 15 stories deep

with walls up to 9 feet thick

that can withstand a direct nuclear impact.

In 2008, Larry Hall bought the property for $300,000.

Hall: We said, "Hey, if we're gonna build

a high-end bunker, I'd hate to, like,

need protection for two years

and only have designed it for one and a half years."

So we said, "What would we have to do to make

this place capable of sustaining people indefinitely?"

And that turned out to be quite a cost-driver.

Narrator: Hall's team spent nearly $20 million to turn

the missile silo into a secure shelter for 12 families.

They installed three redundant power supplies,

three separate water sources and a water filtration system,

aquaponic farming, and hydroponic food.

Then, with the help of a consultant,

the team developed a plan to deal with

the human factors of off-grid living.

Hall: You need to make life as normal as it can be

because subconsciously, your brain

keeps track of abnormal activities.

Narrator: The team added a swimming pool,

gym, rock climbing wall, movie theater, dog park, and more.

Hall: What you really wanna do is make sure

that people feel productive, so you're gonna need

everyone to be working four-hour workdays,

and every 30 days, people will rotate jobs

so you don't have any single points of failure

and everybody knows how to do all of the jobs there.

Narrator: The infrastructure is designed

to sustain 75 people for five years.

The idea was so popular that every unit sold

before construction ended.

The project is just one example of success

in the growing survival market.

Announcer: The basement box-type shelter

is stronger, larger, and more comfortable.

Outdoors, you can build an earth-covered shelter,

which affords the best protection

against blasts, fire, radiation, and radioactive fallout.

Narrator: Doomsday prepping isn't a new idea.

In the '50s and '60s, houses were built with bunkers,

and shelters started popping up during the Cold War.

Today's preppers have plenty of survival shelter options.

They can choose from converted shipping containers

to houses designed to stand up to natural disasters

to survival communities with country club amenities.

Doomsday preppers can also prepare for emergencies

with a multitude of survival products

ranging from water filters and freeze-dried food

to gas masks and emergency power sources.

Hall: They worry about world events and natural events

and the things that they see in the news more frequently.

People that call and worry about things like

a global economic collapse,

there's people that worry about the flu.

Every flu season that comes around,

people worry about some type of a global pandemic.

It just seems like anything that could translate

into a larger dilemma could present itself as a problem.

Narrator: And market activity backs that up.

Sales spikes occur after natural disasters.

For example, Mountain House, a freeze-dried food

distributor, reported that sales of food made

to last for 25 years increased fourteenfold

after Hurricane Katrina.

Fears about the economy and foreign relations

are heightened during major elections

and commonly cause sales to jump.

In the week after Barack Obama's re-election,

one website sold $400,000 of prepackaged meals,

which depleted the company's inventory.

Doomsday Prep, a store in Georgia,

reported a 15% growth in year-over-year sales

since Donald Trump's election in 2016.

Hall: It's kinda funny how it seesaws

with who's in the White House.

When the rhetoric was hot and heavy

between Trump and Kim Jong-un in North Korea,

there was a real big spike in phone calls.

Narrator: Prep and Save, a survival equipment store

in California, reported similar spikes.

The store saw a 200-400% increase in business

in the days following the threats.

The size of the market is difficult to calculate.

But in 2012, public spending on emergency prep

was estimated at $500 million

and an additional $1 billion from the government and NGOs.

The fears driving these purchases

aren't as rare as you might think.

An estimated 35% of Americans believe an event will happen

that will lead to the end of the world.

Hall: All of our owners have been self-made millionaires

by definition, and they're from all walks of life.

They like the concept of having this safe harbor,

and then they also comment about

what peace of mind they get from owning it.

It's like they had this worry that they weren't

consciously aware of, but after they bought it,

they realized that they feel like a burden has been lifted.

Narrator: To meet demand, Hall and his team

are building a second silo that's three times

the size of the original.