Oh, no. The sky is falling, ... again. I thought we handled this in the 19th Century. That's why I told my kids the story about Chicken Licken. To let them focus on the real threats around them.
The magma chambers beneath Yellowstone Park and Western Indonesia could also punch through with a volcanic eruption of a size never before witnessed by man. We could create a nuclear holocaust with 10,000 detonations, at any moment & on & on & ... I grew up in 1950's USA. You can't scare me with this stuff any more.
When you board an airplane, you take your seat, buckle your seat belt and when the door closes, you're on for the whole ride, pal. Common courtesy says you should try to enjoy the peanuts & soda without upsetting the other passengers.
The truth is we aren't smart enough, yet, to divert an asteroid. There are some very good ideas about How. We just don't have the resources or technology to do it in a timely way.