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START (Spacecraft Technology and Advanced Reentry Test)

A United States Air Force program to experiment with lifting bodies, which began after the cancellation of the Dyna-Soar project. It began in 1960 using subscale models of the X-20 Dyna-Soar to test materials, and continued with the ASSET and PRIME suborbital tests of subscale lifting body designs and B-52 drop tests of the X-24A and X-24B lifting bodies into the 1970s.

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