After nearly four years of war in Yemen, at least 10,000 civilians have been killed, while millions more have fled their homes and now face famine and disease. The situation is so dire that the UN has described it as the world's worst humanitarian disaster. The crisis was created in large part by U.S. allies Saudi Arabia and the UAE, who have used U.S.-supplied weapons and planes to turn Yemen into a living hell. Ben Anderson returns to the country, where he obtains access to the various groups waging war for the Saudi- and Emirati-led coalition, and sees the devastating effects of chaotic fighting and indiscriminate bombing on civilians.

Throughout human history, doomsayers - people predicting the end of the world - have lived largely on the fringes of society. Today, however, the doomsday industry is thriving, thanks to TV shows, movies, hyperpartisan politics and the news media. With the country's collective anxiety on the rise, even the nation's wealthiest citizens are jumping on board, spending millions of dollars on survival readiness in preparation for unknown calamities. Thomas Morton sets out to see how people across the country are planning to weather the coming storm.