My pal Veronica Belmont hosts a show on TechFeed called Fact or Fictional, where she investigates the science of a movie based on viewer suggestions. She recently took on thewonderful fantastic gawd-awful piece of festering offal "Armageddon", talking to scientist Joe Hanson, who writes the terrific It's OK to Be Smart blog.
Let's just say they agree with me about the movie:
If you want to learn how we'd really prevent an asteroid impact, and why we need to take this seriously, I gave a TEDxBoulder talk about it. It's a real threat, but one we can prevent if we choose to do so.