Tim Ralston — A survival tool manufacturer (the Crovel), loses part of a thumb during firearms practice for the show; Jason Charles, a New York City fireman-turned-prepper, demonstrates urban survival skills; Jules Dervaes is preparing for the collapse of the industrial food system; Pat Brabble insists on surviving hyperinflation by planning ahead.
For now, he broadcasts Monday through Friday, 9 to 11 a.m., and Finelli invites “instructors”—doctors, dentists, survivalists, a man who carries no identification, an Australian woman who talks about seceding from the government—anyone who has something relevant to preparedness. To Finelli, there’s little that isn’t relevant. He doesn’t sell merchandise or accept donations, as fellow GCN hosts such as Jones do. 
In the early ’80s on a job for the State Department to reinforce U.S. embassies and consulates following the 1983 Beirut barracks bombings, Pense says he and other government contractors around the U.S. converged on CIA headquarters at Langley, Virginia. The consortium of engineers traded notes and decided that the U.S. power grid was vulnerable. Inadequate, Pense says, compared to everything that’s been hung on it, and that was three decades ago. Three high-altitude electromagnetic pulses (EMPs) could take the whole thing down. Like New York City’s 1977 blackout, looting and pillaging would rule the streets, and that’s if they can get the lights back on quickly enough—if the power stays off for too long, order is lost forever. 
I called a Silicon Valley sage, Stewart Brand, the author and entrepreneur whom Steve Jobs credited as an inspiration. In the sixties and seventies, Brand’s “Whole Earth Catalog” attracted a cult following, with its mixture of hippie and techie advice. (The motto: “We are as gods and might as well get good at it.”) Brand told me that he explored survivalism in the seventies, but not for long. “Generally, I find the idea that ‘Oh, my God, the world’s all going to fall apart’ strange,” he said.
Military MREs. I don't find them particularly tasty, but they are popular among preppers. A bit on the heavy side (usually around 1,100 kcal per pound). Portable warm food with a ton of different menus available - although for the best price, you usually need to buy a variety box and can't cherry-pick. Moderately expensive (~150 kcal per dollar). Shelf life around 5-7 years, depending on the manufacturer and on storage conditions. A good source is TheEpicenter.com.
Why do our dystopian urges emerge at certain moments and not others? Doomsday—as a prophecy, a literary genre, and a business opportunity—is never static; it evolves with our anxieties. The earliest Puritan settlers saw in the awe-inspiring bounty of the American wilderness the prospect of both apocalypse and paradise. When, in May of 1780, sudden darkness settled on New England, farmers perceived it as a cataclysm heralding the return of Christ. (In fact, the darkness was caused by enormous wildfires in Ontario.) D. H. Lawrence diagnosed a specific strain of American dread. “Doom! Doom! Doom!” he wrote in 1923. “Something seems to whisper it in the very dark trees of America.”
Of course, some extreme preppers will settle for nothing less than a military-grade gas mask rated for chemical, biological, and nuclear warfare. While it is true that such masks offer much better protection against nerve agents and similar extremely harmful substances, it's not a likely concern in most parts of the world - and either way, it's doubtful that you would have enough time to suit up once the symptoms kick in.
Radio transceiver, standard VHF marine when operating near inland shore, 121.5 MHz AM VHF guard channel capable aircraft band transceiver to contact rescuers and high overflying commercial and military aircraft visible by contrails, an optional amateur radio if a licensed radio amateur, (see Ham Radio) or an AM/FM/Weather/Shortwave radio receiver to receive precise time for celestial navigation as well as weather information