Northern American Aviation ad from 1944.

You may know NAA as Boeing now! Things took a little downturn after WWII but by the time Pete Campbell was meeting with folks in LA business was a-boomin. Did you catch the McNamara reference?

From a Brief of the History Aerospace Industry :

The Vietnam War increased military aircraft purchases, and at the same time there was a renewed wave of airline buying. The war did not actually increase sales proportionally as much as earlier wars had, because of the government’s efforts to economize and because of a low loss rate. But prospects for continued use of piston aircraft were apparently ended, as Secretary McNamara, came to the conclusion that piston aircraft were not as cost-effective as jets. The leading piston attack plane, the A-I, was estimated to cost 100,000 in 1965, a fourfold to fivefold increase over the late 1940’s. The jet revolution for military aircraft was complete.