“What we saw was a very significant event of a test of a hypersonic weapon system. And it is very concerning,” General Mark Milley, chairman of the Joint Chiefs of Staff, said in an interview for “The David Rubenstein Show: Peer-to-Peer Conversations” on Bloomberg Television. “I don’t know if it’s quite a Sputnik moment, but I think it’s very close to that. It has all of our attention.”