In December, Wired magazine revealed that Mark Zuckerberg, CEO of Meta and one of the richest individuals on the planet, was building a $100-million US compound in Hawaii. The compound includes a bunker " 5,000 square feet, to be specific, with concrete walls and an escape hatch. What does this tell us? It's a sign that at least some of the ultra-rich are anxious about global events and are making contingency plans for the Big One " whatever form that may take. The feeling is very much in the air. Architectural Digest named "luxury bunkers" one of the real estate trends of 2023. Brian Cramden, president of Hardened Structures, a Virginia-based firm that builds multimillion-dollar fortified homes and bomb shelters, said work has been "steady" for years but that he has seen a "major uptick in the last two, three months." "With Putin and North Korea and what's going on in Gaza, I'm getting lots of inquiries," he said. "It's [wars], it's Trump, it's the divisiveness of the nation." Cramden said the most commonly cited threats include a breakdown of law and order; the detonation of a nuclear weapon; a hostile power activating an electromagnetic pulse (EMP) to disrupt the communications network; and the diffuse effects of climate change. Vivos, a California-based company that provides "shelter solutions," told CBC "inquiries and applications are up over 2,000 per cent year over year."