The Defense Department is on the cusp of seizing the lead in maneuvering hypersonic technology development from China and Russia and is poised next year to ramp up flight tests to as many 40 over the next four years, according to a senior Pentagon official. Mark Lewis, director of defense research and engineering for modernization, also said the Defense Department will eventually winnow the current portfolio of hypersonic weapon technologies into a smaller number of programs of record. "I do...