Just days in the new year, an 86-foot wide asteroid blasted past Earth at an estimated 14,000 miles per hour. The rock would have exploded if it hit our atmosphere, but we still would have felt the impact. In 2013, a similar sized asteroid exploded over a Russian city, sending heat and shock waves that reportedly shattered windows and injured 1,500 people. James Green is the chief scientist at NASA, where the agency is a on a mission to intercept asteroids before they threaten Earth. He joins Soledad O’Brien in the studio to discuss the new methods they are using to protect our planet.

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