Nova 4117 Ben Franklin's Ballons
Preview | 30s
"Ben Franklin's Balloons” – Replicas of fragile 18th century gas and hot air balloons recreate some of the earliest innovations in human flight. (Also Fri. 10/24 at 3AM; Sun. 10/26 at 2PM)
Aired: 10/22/14
Expired: 11/05/14
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