NASA is marking the 25th anniversary of the Challenger explosion on Friday. Families of the accident’s seven victims are gathering with NASA officials at the Kennedy Space Center. Speakers include June Scobee Rodgers, the widow of Dick Scobee, the spaceship’s commander. Commemorations are also being held around the state of New Hampshire where, Christa McAuliffe, the school teacher who died in the explosion, was from.
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