Kaku on asteroid threat: "We are sitting ducks"

CBSTV Videos
Kaku on asteroid threat: "We are sitting ducks"
Michio Kaku, physics professor at the City College of New York and a "CBS This Morning" contributor, discusses the threat from space from small asteroids, and what he says the world needs -- and costs "chump change" -- to help safeguard our skies.
View Comments (0)