"Hypersonics is like stealth. It is a disruptive technology and will enable various platforms to operate at two to three times the speed of the Blackbird,” Carvalho told Aviation Week. “Operational survivability and lethality is the ultimate deterrent. Security classification guidance will only allow us to say the speed is greater than Mach 5.” The successor to Lockheed Martin’s SR-71 Blackbird, the Mach 3 long-range recon aircraft that once tore across the skies like a Cold-War era arrowhead before its retirement in 1999, may be inching closer toward reality. According to Aviation Week, a handful of visitors to the SAE...