GPS is great but what happens when your battery dies, and you don’t have a portable battery handy? The compass is the one piece of survival gear that will never let you down. Sure, it can’t tell you if there’s a town nearby but it can prevent you from wandering aimlessly in circles. The Eyesky compass is designed specifically to help extricate you from emergency situations. It features conversion charts to measure distances, a rotating bezel ring to determine your heading and adjustable sight lines to plot your course. It’s also built to last. It will take you all of an afternoon to learn how to use the Eyesky compass and it may turn out to be the most valuable afternoon you ever spent.
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. 
Brent prepares his children and grandchildren because he fears an Electromagnetic Pulse, caused by a nuclear detonation will cripple the national power lines, possibly forever. Instead of bunkers, he has built a medieval castle and teaching his children and grandchildren new tactics of defense and survival. This was spun off into its own series, Doomsday Castle. Meanwhile, in Bear Grass, North Carolina, Derek Price also fears an EMP. He is using his privately owned amusement park, called Deadwood, so that he, his friends and family can survive.
Yishan Wong, an early Facebook employee, was the C.E.O. of Reddit from 2012 to 2014. He, too, had eye surgery for survival purposes, eliminating his dependence, as he put it, “on a nonsustainable external aid for perfect vision.” In an e-mail, Wong told me, “Most people just assume improbable events don’t happen, but technical people tend to view risk very mathematically.” He continued, “The tech preppers do not necessarily think a collapse is likely. They consider it a remote event, but one with a very severe downside, so, given how much money they have, spending a fraction of their net worth to hedge against this . . . is a logical thing to do.”
One measure of survivalism’s spread is that some people are starting to speak out against it. Max Levchin, a founder of PayPal and of Affirm, a lending startup, told me, “It’s one of the few things about Silicon Valley that I actively dislike—the sense that we are superior giants who move the needle and, even if it’s our own failure, must be spared.”
Survivalists' concerns and preparations have changed over the years. During the 1970s, fears were economic collapse, hyperinflation, and famine. Preparations included food storage and survival retreats in the country which could be farmed. Some survivalists stockpiled precious metals and barterable goods (such as common-caliber ammunition) because they assumed that paper currency would become worthless. During the early 1980s, nuclear war became a common fear, and some survivalists constructed fallout shelters.
Wherever readers planned to hide out, their safe space needed be stocked with useful items such as tools, fuel, first aid kits and Geiger counters, PSM advised. A month’s supply of food was also desirable. One advert even promoted a wine club, with vintages you could keep in your shelter. As one article put it, “You don’t want to be caught in a queue at the supermarket when the bomb drops!”

Lucas Cameron, a farmer living in Tennessee, is preparing for a New Madrid earthquake and the civil unrest following that. He is also joined by his group of friends and family. Even Kevin O'Brien, first mentioned in Season 1, has recently moved out and joined them. Meanwhile near Denver Colorado, Snake Blocker is preparing to survive like his ancestors, the Apache tribe, by living off the land in the event of a financial collapse.
Nail your studs together in lengthwise pairs at a 90-degree angle to form braces. This makes them stronger. Then run three or four braces horizontally across every door, hammering the nails from above and below directly into the frame at a 45-degree angle. If you drive them straight in, they're easier to pop out when somebody kicks the door. Use more braces to secure the drywall over the windows. Try to use longer nails and leave a couple inches of each nailhead sticking out for easy removal. — Clint Carter