It's just a matter of time before it happens. Some catastrophic event that wipes out a large percentage of the Earth's population; and forces the human race to "reset".
Maybe one of the 30,000 "Near Earth Objects" being tracked by NASA finally hit the Earth. Causing an extinction event on par with what wiped out the dinosaurs.
Or Earth's poles finally shift. And, without its magnetic field, the planet is exposed to the raw destructive power of the Sun's radiation.
Or maybe, on his deathbed, a dictator decides to go out in a blaze of glory; and launches his entire nuclear arsenal.
It's just a matter of time before one of these, or one of another dozen doomsday scenarios plays out.
And when that happens, world leaders like the President of the United States and Vice President will be immediately taken to underground facilities designed for this event. Key members of Congress and the military will also be taken to secure locations.
But what about civilians? There ARE facilities around the world designed to house many thousands of people. But who gets saved while the rest of us are left behind? Who makes that decision?
And where are these facilities? Well, I don't know where VIPs go if they live in Europe or Asia, or Australia. But in the United States, these chosen few? They go to Denver.