http://news.yahoo.com/blogs/technology-blog/meteor-explodes-over-england-violent-force-212434670.html

What will it take before the public realizes that we are on the endangered species list as long as we have no defense against impacts?

If the “golf ball sized” exploder had been another Tunguska and London was incinerated it might become quite clear that we need to get into space in a big way.

Will it take a major disaster? The unfortunate truth is that a rock or snowball just a little bigger than what might wake the human race up- might also render our species extinct.