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Looking back on the Challenger explosion 35 years later

35 years after the Space Shuttle Challenger exploded, killing all seven crew members, Lester Holt looks back on that tragic day as America prepares for a new era of space exploration.

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Looking back on the Challenger explosion 35 years later

35 years after the Space Shuttle Challenger exploded, killing all seven crew members, Lester Holt looks back on that tragic day as America prepares for a new era of space exploration.
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