Back in the 70s there was a Russian pilot who defected to Japan flying a Mig-25 (score for the Americans!). The Mig-25 was out of radar when the pilot flew at low level. This made the Japanese realize that they needed an Airborne Warning and Control System (AWACS). At that time, the E-3 Sentry was the standard, but due to the delivery commitments to the USAF, that E-3 would not...
