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N22YF's activity in the archive.
Try http://space.newscientist.com/article/dn13269-nasa-to-announce-new-commercial-space-partner.html
However, the turbojet-powered XB-70 could theoretically cruise at over Mach 3, although I don't know if cruise at these speeds was ever really demonstrated.
Try http://space.newscientist.com/article/dn13269-nasa-to-announce-new-commercial-space-partner.html
However, the turbojet-powered XB-70 could theoretically cruise at over Mach 3, although I don't know if cruise at these speeds was ever really demonstrated.