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| | Spaceflight :Atlas |
 | | Cutbacks in the national defense budget triggered a corresponding reduction in missile development funding and, in June 1947, the USAAF canceled Convair's research contract; however, the company was permitted to spend its remaining funds to finish constructing three missile test vehicles and continue investigating missile guidance and nosecone concepts. |
 | | The basic Atlas vehicle, remarkably unchanged almost 50 years after its inception, is a 1½ stage liquid-propellant launch vehicle consisting of a booster section and a sustainer section, a unique configuration that enables the missile to launch itself into orbit. |
 | | Atlas model D, E, and F ICBMs, outfitted with nuclear warheads, were deployed at Air Force bases throughout the United States, stored vertically in underground silos and raised by elevators to an above-ground position for launch. |
| www.centennialofflight.gov /essay/SPACEFLIGHT/Atlas/SP10.htm (1696 words) |
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