The Boeing 720 was a shortened and lighter derivative of the 707 designed for short- to medium-range airline routes and airports with shorter runways. First flown in 1959, it brought four-engine jet service to domestic and regional networks worldwide; the later 720B introduced JT3D turbofans, and 154 aircraft were built before the 727 and 737 assumed the market. Retired airframes later served as freighters, test aircraft, and museum exhibits.
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