Do you know this asteroid documentary?

Hello, are you familiar with a documentary that is basically an illustration of how would humanity behave around the world is an asteroid was to hit the Earth in our days… I though it was Asteroid Apocalypse of the History Channel but it’s not. I can remember some parts of the program, some tribe in Africa was in an uproar, hardly attacking the village’s religious authority wondering what had happened to the sun, some guy in Mexico builds an underground fortress and upon the strike crawls out with his dogs who later flee his side desperate for water and this kid ends up arriving at the zone of impact… and I recall also that what it said in the end was that the human race would in fact survive and not disappear like the dinosaurs did, and it showed some happy people in some mountains somewhere… If someone knows what it was, please post…