> it's what we call a global killer. nothing would survive. not even bacteria. >> reporter: asteroids are very real threats, and having the means to deflect them is a vital interest to everyone on planet earth. >> if we could confirm that the thing was deflected by less than 1 degree, we know that this would, in principle, work on a large scale. >> reporter: the last time a deadly asteroid hit earth was around 65 million years ago. >> you can bet that if the dinosaurs had nasa, they would have deflected that asteroid. >> what a moment. >> reporter: monday's test hopes to prevent that from ever happening again. >> should all earthlings sleep a little easier tonight? >> i definitely think that, as far as we can tell, our first planetary defense test was a success and i think we can clap to that, everyone. so -- right? so, yeah, yeah, i think that earthlings should sleep better. Get Live News Updates Every Minute from vimarsana.com Curated from 23000 News Agencies."> > it's what we call a global killer. nothing would survive. not even bacteria. >> reporter: asteroids are very real threats, and having the means to deflect them is a vital interest to everyone on planet earth. >> if we could confirm that the thing was deflected by less than 1 degree, we know that this would, in principle, work on a large scale. >> reporter: the last time a deadly asteroid hit earth was around 65 million years ago. >> you can bet that if the dinosaurs had nasa, they would have deflected that asteroid. >> what a moment. >> reporter: monday's test hopes to prevent that from ever happening again. >> should all earthlings sleep a little easier tonight? >> i definitely think that, as far as we can tell, our first planetary defense test was a success and i think we can clap to that, everyone. so -- right? so, yeah, yeah, i think that earthlings should sleep better. Get Live News Updates Every Minute from vimarsana.com Curated from 23000 News Agencies." property="og:description"> > it's what we call a global killer. nothing would survive. not even bacteria. >> reporter: asteroids are very real threats, and having the means to deflect them is a vital interest to everyone on planet earth. >> if we could confirm that the thing was deflected by less than 1 degree, we know that this would, in principle, work on a large scale. >> reporter: the last time a deadly asteroid hit earth was around 65 million years ago. >> you can bet that if the dinosaurs had nasa, they would have deflected that asteroid. >> what a moment. >> reporter: monday's test hopes to prevent that from ever happening again. >> should all earthlings sleep a little easier tonight? >> i definitely think that, as far as we can tell, our first planetary defense test was a success and i think we can clap to that, everyone. so -- right? so, yeah, yeah, i think that earthlings should sleep better. Get Live News Updates Every Minute from vimarsana.com Curated from 23000 News Agencies.">