Begin with a description of of the "DEW Line" (Distant Early Warning) -which consisted of a series of high wooden towers manned by plane spotters- that had no communication devices at all. The tower personnel were to climb down and drive to the nearest phone once they spotted incoming enemy aircraft. Then move briskly onto a detailed description of the University/Military/Industrial Complex... and you have a fascinating book about how the U.S. stumbled away from WWII with the overwhelming need to protect our borders from aerial invasion. This was of course impossible, but damn profitable to the right universities (MIT,Stanford, etc..) and the "right-sized" companies.