How A Mig-31 Repelled The World's Fastest Spy Plane From Soviet Skies The SR-71's impressive mission record was reached thanks to some unique features of its airframe, such as its ability to fly at more than three-and-a-half times the speed of sound at 88,000 feet, its small (for the time) Radar Cross Section (RCS), and its sophisticated electronic countermeasures (ECM).
Dec. 11, 2013 - Business Insider