> First Shuttle orbited astronauts and successfully recovered all intended components. There were 16 taxi and flight tests with Enterprise before the launch in

> First Shuttle orbited astronauts and successfully recovered all intended components. There were 16 taxi and flight tests with Enterprise before the launch in 1981 (Approach and Landing Tests - Enterprise) where the first 8 were uncrewed. Just saying there were prior test flights using it. There was something like 4 years of testing before the proper launch.