1、 https:/crsreports.congress.gov Updated January 26, 2022Hypersonic Missile Defense: Issues for CongressThe Missile Defense Agency (MDA) and Space Development Agency (SDA) are currently developing elements of a hypersonic missile defense system to defend against hypersonic weapons and other emerging
2、missile threats. These elements include the tracking and transport layers of the National Defense Space Architecture (NDSA) and various interceptor programs. As MDA and SDA continue to develop these systems, Congress may consider implications for oversight and defense authorizations and appropriatio
3、ns. Background Hypersonic weapons, like ballistic missiles, fly at speeds of at least Mach 5, or roughly 1 mile per second. Unlike ballistic missiles, hypersonic weapons do not follow a ballistic trajectory and can maneuver en route to their target. Russia reportedly fielded its first hypersonic wea
4、pons in December 2019, while some experts believe that China fielded hypersonic weapons as early as 2020. The United States is not expected to field hypersonic weapons before 2023. (For an overview of hypersonic weapons programs in Russia, China, and the United States, see CRS Report R45811, Hyperso
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