Burt Rutan recommends spending on Planetary Defense

From: http://www.aero-news.net/index.cfm?ContentBlockID=3817e162-da22-4712-a108-9d40f85f77ec

He says the best way for money to be spent to protect the planet is research into a planetary defense system against asteroid strikes, "the only real extinction threat the planet has ever had and the only one in which Man can indeed use his intelligence and sweat to successfully defeat."