Here's a great video displaying someone of the DUMBs...
In the last few years, these bunkers have been stocked and prepared for some sort of mega-disaster (including a nuclear war, which was always its original intent). Over the few weeks, rumors have been circulating that a couple of the underground bases were nuked in late August, which caused the earthquakes in Colorado and Virginia.
And just recently, there's been chatter that President Obama and the "elites" in power have been flocking to Denver in preparation to head underground and ride out the effects of a nasty batch of CMEs (solar flares), and/or Comet Elenin and the upcoming planetary alignment.
If there's a DUMB in your neighborhood, I doubt they'll let you in, so don't bother looking for any of them.