http://www.playfuls.com/news_004779_Global_Solutions_Sought_for_Dangerous_Incoming_Asteroids.html
This feels eerily paranoid...
75% of the country is ocean... an asteroid, even IF it managed to get through the atmosphere with enough mass to do any sort of harm, which would imply a perfect trajectory, has more chance of hitting somewhere with no one than with anyone...
Also, people are thinking tractor beams... Come on now...