Global security leaders are warning nuclear threats are growing as weapons spending surged to $91.4 billion last year. At the same time, private bunker sales are on the rise globally, from small metal boxes to crawl inside of to extravagant underground mansions. Critics warn these bunkers create a false perception that a nuclear war is survivable. They argue that people planning to live through an atomic blast aren’t focusing on the real and current dangers posed by nuclear threats, and the critical need to stop the proliferation of weapons of mass destruction.