space shuttle landing safely
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space shuttle landing safely
航天飞机安全着陆
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"Together, we proved that a human in freefall can break the speed of sound returning from near space, going through a transonic phase and landing safely on the ground, " said Dr Jonathan Clark, a former space shuttle flight surgeon and the Red Bull Stratos medical director.
BBC: Skydiver Felix Baumgartner fell faster than first thought