America, China and Russia are engaged in a new arms race, spending billions to develop new missile technology, but how different are these hypersonic missiles from what has gone before? And as countries work out how they might use them, are they increasing the risk of triggering conflict?

Contributors:

Presenter: Tanya Beckett

Image: Military parade in Beijing marks 70th anniversary of Chinese People's Republic (Credit: Zoya Rusinova/TASS via Getty Images)