Until recently, the U.S. seemed to be clearly ahead of the rest of the world in hypersonic propulsion research. But our recent reporting on developments in China and Russia suggests the U.S. could easily lose its lead (AW&ST Feb. 20-March 5, p. 20). It may have lost its lead already. As our correspondent reports from a remarkable hypersonics conference in Xiamen in this issue, China has “a coherent, nationwide hypersonic research and technology program [of] astonishing depth and ...


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