After Elon Musk's tweets that a 'big rock' is going to hit Earth, NASA says there is no known threat

WITI Fox Milwaukee

Aug 20, 2019

BEL AIR, Calif. --- Elon Musk, CEO of SpaceX and Tesla, tweeted that a "big rock" is going to hit Earth, and that we "currently have no defense," but NASA seems to disagree. Musk's…