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Instant Index: Scientists Find Source of Russian Meteor Crash

David Muir with the top stories that have people buzzing this week.
01:18 | 02/26/2013

Transcript for Instant Index: Scientists Find Source of Russian Meteor Crash

We're going to turn to the "instant index" here on a tuesday night. And we begin here with that familiar boom heard around the world. Who could forget it? Tonight, scientists have figured out where... See More
This transcript has been automatically generated and may not be 100% accurate.
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