asteroid defences: Jupiter and our atmosphere.Nothing is safe, but to say its a imminent disaster waiting to happen is scare-mongering. We haven't got asteroid defences.. yet an asteroid could hit at any time. Our children go on swings.. but could easily break their neck if they fell off.
The only 'big' examples are Chernobyl and Three Mile Island, Chernobyl being the only ever meltdown in history.
A kid falling off a swing and breaking there neck is one person, not a whole country and effecting others.