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PBS News Hour
New NASA mission aims to veer asteroid off its course
NASA has launched a satellite into orbit on a mission to smash itself into an asteroid, in a test to see whether it is possible to knock a speeding space rock off course — if one were on a collision course with Earth. The asteroid targeted in this case is not a threat to our planet. To break it all down, Amna Nawaz is joined by science correspondent Miles O'Brien.
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