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Science 9 May 2003:
Vol. 300. no. 5621, pp. 888 - 889
DOI: 10.1126/science.300.5621.888
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News Focus

MILITARY RESEARCH:
Mach 12 by 2012?

David Malakoff

The Pentagon wants to boost research into planes and weapons that can travel at hypersonic speeds--above Mach 5, and perhaps as fast as Mach 12. But the technical barriers remain daunting.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)