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Should you believe the hype(rsonic)?

Over the past few months, US officials have become increasingly alarmed about a new type of killing machines called "hypersonic weapons."

The top US General, Mark Milley, said that China's successful test of an advanced hypersonic weapon earlier this year was "very close" to a "Sputnik moment" – referring to the Soviet Union's surprise launch of the world's first artificial satellite in 1957, which raised fears that the US was lagging behind a formidable technological rival.

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Nuclear arms control: perspective from arms control expert Kelsey  Davenport

Arms control expert Kelsey Davenport joins Ian Bremmer on GZERO World to talk about the world's long fascination with nuclear weapons and how close we still remain to all-out nuclear war. Today's nuclear threat is not about who has the most nukes, it's about who has the smartest ones. Davenport addresses the question: Do nuclear weapons keep us safe?

Watch this episode of GZERO World with Ian Bremmer:

Nuclear nonproliferation has worked so far, but watch out for those questioning it — arms control expert

Nuclear nonproliferation treaties have been a success at stopping the atomic club from growing further by discouraging new membership, but nuclear weapons expert Kelsey Davenport says the slow pace of disarmament "is causing some states to begin to question that bargain." Although it's unlikely that nuke-curious countries will actually get the bomb because it costs too much time, money and resources, Davenport told Ian Bremmer on GZERO World that she believes that simply questioning the benefits of nonproliferation creates a real risk that must be "monitored and mitigated."

Watch the episode: Nuclear weapons: more dangerous than ever?

Nuclear weapons: more dangerous than ever?

In recent years, as nuclear disarmament worldwide has slowed to a crawl, world powers are engaging in a new kind of arms race: a technological one. Today's nuclear threat is not about who has the most nukes, it's about who has the smartest ones. Arms control expert Kelsey Davenport joins Ian Bremmer on GZERO World to talk about the world's long fascination with these horrible weapons and how close we still remain to all-out nuclear war.

Podcast: Do nuclear weapons keep us safe? An arms control expert weighs in

Listen: Arms control expert Kelsey Davenport joins Ian Bremmer on the GZERO World podcast to talk about the world's long fascination with nuclear weapons and how close we still remain to all-out nuclear war. Today's nuclear threat is not about who has the most nukes, it's about who has the smartest ones. Davenport addresses the question: Do nuclear weapons keep us safe?

Subscribe to the GZERO World Podcast on Apple Podcasts, Spotify, Stitcher, or your preferred podcast platform to receive new episodes as soon as they're published.

The new nuclear arms race: Smarter, faster nukes

There's a lot of talk about nukes these days — but not about Cold War-era massive arsenals and mutually assured destruction. Nuclear weapons expert Kelsey Davenport says the risk of something going horribly wrong is rising because countries like China or Russia are developing smaller warheads and high-tech delivery systems such as hypersonic missiles, which traditional arms control agreements don't take into account. "We have to be more creative than thinking just about the numbers," she explains, adding that what's more destabilizing is countries investing in nukes that are so nimble and travel so fast they can penetrate US defense systems. Watch her interview with Ian Bremmer on the upcoming episode of GZERO World on US public television - check local listings.

What We’re Watching: Kim goes hypersonic, confident Europeans, Japan’s new safe hands

Kim Jong Un breaks the sound barrier: North Korea has announced the successful test of a "strategic weapon" that travels five times faster than the speed of sound. The Hwasong-8 missile, which is believed to be nuclear-capable, is a hypersonic weapon which is much harder for missile defense systems to track than conventional ballistic missiles. The US, China, Russia, and India are the only other countries known to be working with this highly sophisticated technology. And although experts aren't quite sure how developed the Hwasong-8 actually is, this is the third missile test that North Korea has conducted in the last month, suggesting that Pyongyang is getting plucky again as nuclear negotiations with the US remain in a deep freeze.

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