32 years after the Challenger disaster, astronauts Joe Acaba and Ricky Arnold will honor fallen astronaut Christa…

Originally shared by NASA

32 years after the Challenger disaster, astronauts Joe Acaba and Ricky Arnold will honor fallen astronaut Christa McAuliffe later this year from the International Space Station by carrying out the lesson plans she intended to do on her mission: http://go.nasa.gov/2FeUPFk #NASARemembers

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