Franklin Chang-Díaz

American astronaut and entrepreneur (born 1950)

Franklin Ramon Chang-Díaz (born April 5, 1950) is a Costa Rican which whom became an American mechanical engineer, physicist, and former NASA astronaut. He is the sole founder and CEO of Ad Astra Rocket Company as well as a member of the Cummins' board of directors. He became a U. S. citizen in 1977.

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