The U.S. Air Force has signed a $694 million contract with Lockheed Martin to manufacture and deploy hypersonic strike missiles. Signed in September, the agreement moves the AGM-183A Air-Launched Rapid Response Weapon, or ARRW, from testing into production for military deployment. Hypersonic missiles fly at more than five times the speed of sound and can take horizontal flight paths at low altitudes. As a boost-glide
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