The Tupolev Tu-144 was a supersonic airliner that was first flown in the Soviet Union in December 1968. While it just about beat the Anglo-French Concorde in terms of making its first flights, it had a far shorter and less successful career as a commercial aircraft. However, in the 1990s, NASA worked with the plane's manufacturers to develop a new variant, which was known as the Tu-144LL.
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