In support of US hypersonic system development

https://www.defensenews.com/opinion/commentary/2021/01/29/in-support-of-us-hypersonic-system-development/

Both China and Russia have already fielded hypersonic weapons with initial capabilities. It is therefore essential that the U.S. responds through development of effective defensive measures.

https://peterholland765.wordpress.com/2021/02/04/in-support-of-us-hypersonic-system-development/