The Pentagon's inspector general is beginning an audit of the U.S. military's marquee hypersonic strike project that will focus on one of the most salient aspects of the program: scheduled plans to begin fielding a new class of ultra-fast weapons by the Army in 2023 and the Navy in 2025. On Aug. 8, Randolph Stone, assistant inspector general for evaluations for space, intelligence, engineering and oversight, advised the Army and Navy secretaries as well as the under secretary of defense...