NASA's first space shuttle flight was in April 1981, the last was in July 2011. The pits also are the perfect size for cell storage, according to Thanga. But I think the same complexity is what makes them beautiful, he said. Two of the shuttles - Challenger and Columbia - were destroyed, one at launch, the other during the ride home. Its not crazy big, Thanga insisted.
Challenger and Columbia were not successful in the space shuttle test in 1981.
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              :ARG1 (z7 / shuttle
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    :polarity -
    :time (z9 / date-entity
              :year 1981))
Challenger and Columbia were not successful in the space shuttle test in 1981 .
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