[theold]

THE UNITED STATES is largely defenseless against such weapons, at least for now, in part because it can't track them.

Russian boasts along with Chinese advances have sounded the alarm in the United States. Congress will pour more than $1 billion into military hypersonic research this year and has created a new university consortium to do basic studies. "Our work on hypersonics has really ramped up," says Jonathan Poggie, an aerospace engineer at Purdue. His team models low-frequency shock waves "that pound on a vehicle like a hammer."



https://www.science.org/content/article/...ic-weapons