Final answer:
The Tupolev Tu-144 was the world's first Supersonic Transport (SST) jet, developed in Russia. However, it faced challenges and did not have the lasting impact of the Concorde.
Step-by-step explanation:
The Tupolev Tu-144 was the world's first Supersonic Transport (SST) jet. It was developed in Russia and made its first flight in 1968, two months ahead of its competitor, the Concorde. Despite its early success, the Tu-144 faced many technical and commercial challenges, and its operational life was limited. While it was an impressive achievement in aviation, the Tu-144 did not have the same lasting impact as the Concorde.