Back in the 1960s-early 1980s, some Americans were fearful of a nuclear attack.
After the cold war, that craze mostly ended.
Today, it is more of a fear of the fateful Mayan year 2012, with solar flares that year being the big potential disaster.
All the rumors of huge underground government installations to ride out the solar flares is intriguing and what could be under the Denver Airport tops the list.
Let's face it, from earthquakes to severe weather, there's a lot of potential for disaster out there.
Best advice is to have a good emergency supply of food for at least some months out, as well as some emergency lighting/heating plans.
All it takes is one big earthquake or extreme solar flares and the electrical power grid could be down for weeks or more. That alone could bump us back to the 19th Century.
So, have some sort of emergency stockpile and plan, it only makes sense.
Just don't be extreme or fanatical about the future, or you'll not enjoy the present.