[Paleo Conservative]

The US, smartly, killed the Boeing SST before it became a cash monster.

Boeing didn't kill it; Congress killed it. And that was well before the OPEC oil embargoes that followed the Yom Kippur war in 1973 which made the SST uneconomic.

[Central Scrutiniser]

Like I said, the US killed the SST, not Boeing, it was a gravy train for them.