Which Country has successful conducted a test-flight of a Hypersonic Missile after Russia?

A. USA
B. North Korea
C. France
D. Israel

Hypersonic flight. Hypersonic flight is flight through the atmosphere below about 90 km at speeds above Mach 5, a speed where dissociation of air begins to become significant and high heat loads exist. Russia is the first country to deploy a hypersonic nuclear missile.
The U.S. Defense Department tested a hypersonic glide body in a flight experiment conducted from the Pacific Missile Range Facility in Kauai, Hawaii, on March 19, 2020. The Navy and Army jointly executed the launch. (U.S. Defense Department)