The $13 billion startup racing to close America’s hypersonic gapT1Covered by 1 source · first reported by Fortune at 31 Oct, 11:00 UTCCastelion is racing to give the U.S. the affordable hypersonic missile it doesn’t yet have.SourcesT1The $13 billion startup racing to close America’s hypersonic gapFortune31 Oct, 11:00