Shrouded in secrecy, the SR-71 Blackbird was a US reconnaissance plane used from the 1960s through the 90s. Difficult to detect by radar and virtually untouchable by anti-aircraft missiles, it flew at three times the speed of sound and at altitudes of up to 85,000 feet (26,000 m). Its existence was publicly acknowledged in 1964. A decade later, an SR-71 flew from New York to London in just under 1 hour and 55 minutes, crushing the previous record. What life support measures kept the crew alive? Discuss
Source: The Free Dictionary