Who Should Be In Charge of Defending Earth Against Asteroids?

After last week's near-miss asteroid encounter, along with a very definite asteroid hit over Russia, scientists and government workers are buzzing with questions about what can be done to protect humanity from blazing-fast balls of rock from space. We already have some pretty good ideas about what could be done to… »2/18/13 6:30pm2/18/13 6:30pm