Word: liquidation
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...report, ABC cited an internal National Aeronautics and Space Administration memo by Arnold Aldrich, manager of the shuttle project in Houston, that said an operator at Cape Canaveral inadvertently dumped 18,000 pounds of liquid oxygen from the shuttle's external fuel tank...
...Feynman probed further, he was told by NASA that the surface temperature of the external tank, which contains supercold liquid oxygen (-297 degrees ) and hydrogen (-423 degrees ) had not been abnormally cold, casting doubt on a theory that liquid fuel, leaking unnoticed from the tank, had chilled the nearby booster. He also discovered that the wind on the morning of the launch had been blowing across the cold surface of the tank toward the right booster. As one NASA engineer explained, "Even a slight breeze, wafting over the external tank full of those cryogens (supercold fluids) may have been enough...
...documents had long ago warned about problems with the crucial O rings, the two giant synthetic-rubber washers that seal each joint between the booster-rocket segments. Next, an article in Aviation Week & Space Technology spelled out in extraordinary detail how the starboard booster had caused Challenger's external liquid-fuel tank to explode. Then, NASA released pictures showing a mysterious puff of black smoke apparently emerging from the booster at lift- off. The 13-member panel, which includes former Secretary of State William Rogers, Nobel Laureate Physicist Richard Feynman and Astronauts Neil Armstrong and Sally Ride, seemed to have...
...from the side of Challenger's right booster had either melted or wrenched loose the struts that held the booster to the lower end of the external tank. The booster then pivoted on its still intact upper-attachment fitting and crashed its nose into the tank wall. The escaping liquid oxygen and liquid hydrogen ignited, causing the fatal explosion. At week's end NASA had not commented on the report...
...time of the launch the air temperature had risen to 38 degrees, but a dramatically lower temperature on the surface of the booster might have been an indication that supercold liquid hydrogen was leaking from the huge external fuel tank, investigators...