Hypersonic flight has long been a military obsession, but the idea of a sitting United States president crossing oceans at more than five times the speed of sound would push that technology into the ...

Key Points and Summary - Decades before the rumored SR-72 "Darkstar," America had already conquered hypersonic flight with the X-15 rocket plane. -In 1967, this remarkable experimental aircraft, ...

Summary and Key Points: In the mid-1980s, reports from the Los Angeles Times and Aviation Week suggested the existence of a top-secret U.S. aircraft project called “Aurora,” believed to be... Summary ...