There were also ads for the raw materials needed to make planes and rockets: titanium, graphite, rubber, stainless steel, aluminum. Layered on top of that were dozens of subindustries that had sprung up after the war, many of which straddled the line between public subsidy and private enterprise: makers of helicopters, circuit breakers, aircraft bolts, aircraft engines, roller bearings, navigation and radar systems, aircraft spark plugs, rockets and much else. A typical full-page ad from January 1957, for example, hawks a product made by the Radio Corporation of America—RCA, at the time, the 25th largest company in America, with nearly 80,000 employees and well over a billion dollars in annual revenue. Most Americans associated it with radios and televisions, but RCA also—as this ad made clear—had a “defense electronic products” division that made guidance systems for Air Force planes. An illustration shows seven white Air Force fighters, each with its system trained on a large, black, unmarked aircraft. The copy promises readers, “Fire control radar tells WHERE TO AIM/WHEN TO FIRE!”