Smaller asteroids and comets going undetected

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Smaller asteroids and comets going undetected

by CBSTV Videos 2:53 mins

Smaller asteroids and comets going undetected

by CBSTV Videos 2:53 mins

"60 Minutes" contributor Anderson Cooper reports that, while large asteroids and comets are tracked, the smaller ones go undetected and could pose a very dangerous threat.

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