From the introduction: "[This] report reviews the hypersonic weapons programs in the United States, Russia, and China, providing information on the programs and infrastructure in each nation, based on unclassified sources. It also provides a brief summary of the state of global hypersonic weapons research development. It concludes with a discussion of the issues that Congress might address as it considers DOD's funding requests for U.S. hypersonic technology programs."
CRS Report for Congress, R45811
Congressional Research Service: https://crsreports.congress.gov/