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In the western US a landmark deal to protect one of the country's most important waterways has finally been reached. The Colorado River serves more than 40 million Americans across multiple states, but it’s drying up at an alarming rate. Drought, overuse, and climate change are largely to blame. In the new deal, the lower basin states, Nevada, California and Arizona, will temporarily cut their water usage. In exchange, they’ll get over a billion dollars’ worth of federal grants. It’s a significant reduction, about 13% of their total demand. But experts are already warning that it’s not a long-term fix. Wyoming Governor Mark Gordon joins Bianna to discuss how his upper basin state should also see the benefits of the deal.  Also on today's show: South Carolina Senate Republican Penry Gustafson; national security analyst and journalist Peter Bergen; Kahn Academy founder/CEO Sal Khan To learn more about how CNN protects listener privacy, visit cnn.com/privacy

As we enter an uncharted era of artificial intelligence, Christiane takes a look at the risk of a creation turning on its creator. OpenAI, the company behind ChatGPT, is calling for an international regulator, much like the nuclear watchdog, to prevent a catastrophe endangering our existence. The real-world impact of this technology, which is still in its infancy, is already being felt. Like the fake AI image of an explosion at the Pentagon, which caused a selloff on the stock market this week. But it’s also driving scientific breakthroughs, like the paralyzed man who just took his first steps in a decade, thanks in part to AI technology. Alondra Nelson was acting director in the White House Office of Science and Technology Policy and the architect of the Biden administration’s Blueprint for an AI Bill of Rights. Christiane asked her about the threats, opportunities, and the global moves to regulate AI.  Also on today's show: Actor Oscar Isaac and Prodcuer Jeremy O. Harris; Dr. Daniel Grossman, Director, Advancing New Standards in Reproductive Health, UCSF & Medical Sociologist Katrina Kimport To learn more about how CNN protects listener privacy, visit cnn.com/privacy

The race for the Republican nomination for US president is expanding. Florida Governor Ron DeSantis is throwing his hat in the ring, as has long been expected. Donald Trump is still dominating the field and he’s already spent millions attacking DeSantis. Trey Grayson is a former Kentucky Republican Secretary of State and was also the head of Harvard’s Institute of Politics. He’s now a practicing attorney and tells Christiane what this field of presidential hopefuls tells us about the Republican Party and its priorities.  Also on today's show: Reality Winner, former enlisted US Air Force member and NSA translator who made headlines in 2017 after being arrested on charges of leaking classified information to the media. Now, her story is told in the new HBO film Reality directed by Tina Satter. Reality is now on supervised release in Corpus Christi, Texas. She joins Christiane along with Tina to discuss the new film. To learn more about how CNN protects listener privacy, visit cnn.com/privacy

Greece has come a long way since it stood on the brink of bankruptcy a decade ago. After years of painful austerity measures, tax hikes, pension cuts, and huge bailout checks, its post-pandemic economy is now outpacing the eurozone average. And despite a spying scandal, rising inflation and a tragic train crash that killed 57 people, Prime Minister Kyriakos Mitsotakis’ center-right party tapped into underlying optimism, especially among young voters, to win a convincing victory on Sunday. He joins Christiane for his first interview after his party’s election win.  Also on today's show: Rachel Reeves, UK Labour Party’s Shadow Chancellor of Exchequer; Rich Lowry, Editor-In-Chief, National Review To learn more about how CNN protects listener privacy, visit cnn.com/privacy