| Tupolev (4) |  |
the only other civilian airliner able to break the speed of sound was the Soviet union Tupolev tu-144,
A variant of the Tupolev was used in experiments by Nasa, and American and Russian aerospace industries, in a joint research program after the end of the Cold war.
The end of the Concorde and Tupolev airliners left the supersonic market empty. But now, 12 years after the Concorde fleet last flew,
The Concordes and Tupolevs that paved the way for supersonic air travel in the 1970s now gather dust in museums.
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