The is worried about China and Russia developing hypersonic . These can travel up to twenty the speed of . A top U.S. military said China and Russia having hypersonic missiles could be a security for the USA. General John Hyten warned that the USA could not stop Russia or China using missiles against it. He said the USA needed nuclear weapons to stop anyone attacking the USA. President Donald Trump plans to "get in the not-too-distant future" with Russian President Vladimir Putin to talk about the arms .
Russia successfully tested a hypersonic missile this . China tested its missiles last year. It will soon have its weapons for use. President Putin said Russia needed the weapons of actions other countries have taken against it. He said " sanctions" have hurt Russia's . He added: "You have failed to contain ." Mr Putin says the missiles can fly in the world and "strike like a ". Tensions increased this week after the UK and USA expelled Russian because of the of a Russian spy in England.