>>1121497SST was the front for buying titanium from the Soviets. One can put one's foil-lined conspiracy theory hat and guess that the SST program was never intended to succeed.
Our only other source of titanium would have been Canada. But they intended to use the Arrow program as a means of developing their mining and machining industry. And they were so pissed at the US for getting the program cancelled, that source dried up.
