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The U.S. Defense Department is working in classified secrecy on at least two more hypersonic weapon programs, industry officials say.  

The Defense Department has inserted billions into a five-year budget plan to develop a long list of offensive and defensive hypersonic weapon systems.  A check of the budgets for unclassified programs reveals a significant surplus, which could be used to fund classified projects.

The plethora of planned hypersonic options are intended to serve tactical and strategic goals.          

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