In the UK, Prime Minister Boris Johnson is trying to ease the lockdown, while mindful that the nation’s infection and death rates are the highest in Europe. But moving the country from “stay at home” to “stay alert” has been derided as vague at best, confusing and contradictory at worst. Sir David King, the UK’s former chief scientific adviser, joins the program to discuss.

Tomorrow, the Supreme Court takes on the biggest presidential immunity cases since Watergate, as they consider whether President Trump can block congressional and criminal inquiries into his financial practices. As business investigations editor at The New York Times, David Enrich is a leading expert on President Trump’s deeply tangled financial history. He joins the program to discuss the stakes.

Tom Ridge is an American veteran and former governor who has strong words for the armed protestors opposing lockdown measures across the country. Ridge served in Vietnam and went on to become America’s first Secretary of Homeland Security in the aftermath of 9/11. He speaks with Michel Martin about the need for self-sacrifice and unity in times of crisis.

Today marks the 75th anniversary of the end of World War II in Europe. But this year, there were no crowds in the streets, no big parades, no pomp and no pageantry. Modern presidents and prime ministers have been quick to call themselves wartime leaders. How well are they measuring up to the challenge? To discuss, Christiane speaks with historians Max Hastings and Doris Kearns Goodwin.

Dr. Jane Goodall's pioneering work with chimpanzees revolutionized primatology. As we self-isolate, it is our very interconnection with nature that she invites us to think about. A new documentary, "Jane Goodall: The Hope," celebrates her six decades of groundbreaking work.

President Trump faces a tough re-election campaign, as the once buoyant economy deflates into recession. How will this affect his chances in November? The New Yorker's Evan Osnos says one answer lies in what he calls a "persistent mystery" at the ballot box. For his latest piece, he looks to his hometown of Greenwich, Connecticut to explore how Republicans there came to support the president.

British folk singer Laura Marling thought she would be touring the UK and the U.S. right now. Confined her to her home by the pandemic, she decided instead to give us some music to get us through: a surprise early release of her new album, "Song for Our Daughter." She joins the program from home.

More than 100 potential COVID-19 vaccines are in the works, but how soon can we expect positive results? Dr. Richard Hatchett served as an adviser on pandemics for the White House under Presidents George W. Bush and Barack Obama. Hatchett is now CEO of the Coalition for Epidemic Preparedness Innovations, which is working to speed up vaccine development.

When UC San Francisco's medical center was running low on PPE--personal protective equipment for healthcare workers, the chancellor turned to his billionaire friend Marc Benioff, founder and chief executive of software giant Salesforce, to acquire the necessary equipment. Why go to a tech company to help unblock a medical supply chain? Walter Isaacson speaks with Benioff to find out.

Former British Prime Minister Tony Blair has called the pandemic "the most complicated and difficult challenge" he has ever observed, and is now devoting the full resources of his institute towards creating a strategy for pulling countries out of lockdown.

Questions about voter safety during the presidential election in November are casting doubt on a process already fraught with security concerns. Stacey Abrams is frequently touted as a potential running mate for Joe Biden, and--until the pandemic hit--she was leading the fight for free and fair elections as the founder and chair of the activist group Fair Fight.

As the U.S. Treasury begins bailing out businesses across America, it's important to know which companies are getting the money and how it's being spent. Bharat Ramamurti was the first appointee to the Congressional Oversight Commission, tasked with policing coronavirus corporate relief loans. He speaks with Sheelah Kolhatkar about his new role.

In the UK, the death toll from the coronavirus is at least 29,427--currently the highest reported in Europe. Dr. David Nott is a surgeon in Britain's National Health Service and a war doctor, having spent 25 years volunteering in some of the world's most dangerous conflict zones. Now he's in London, fighting the coronavirus on the front lines--which he says is worse than operating in Syria.

The war of words between the U.S. and China over how coronavirus started is escalating--even igniting fears of a new trade war. With global markets once again spooked by President Trump banging the trade drum, how will the two biggest economic powers emerge from this crisis? Former Labor Secretary Robert Reich and Eurasia Group president Ian Bremmer join the program.

Alongside COVID-19 comes another epidemic: disinformation. Alex Stamos was formerly the chief of security at Facebook and is now at Stanford University. He joins Hari Sreenivasan to discuss tensions between the U.S. and China and the dangers of disinformation campaigns in these uncertain times.

Health experts warn that communities in the Amazon region are in danger of being wiped out by COVID-19. A large group of artists and celebrities have written an open letter to President Bolsonaro urging him to prevent a coronavirus "genocide," and one of the signatories--renowned Brazilian photographer Sebastião Salgado--joins the program to discuss.

In a bid to speed up crucial COVID-19 research, the European Union today launched a pledging marathon, co-hosted by Canada, France, Germany, Italy, and others. But notable absences include India, Russia, and the United States. European Commission President Ursula von der Leyen is overseeing the effort, and joins the program to talk about the pledging goal and the importance of global unity.

General David Petraeus led troops in Iraq during the 2003 war and also led coalition forces in Afghanistan. He then went on to lead the CIA and is now global chair of the New York investment firm KKR, so he is well-placed to know what constitutes good strategic leadership. Petraeus speaks with Walter Isaacson about how wartime lessons can be applied to fighting a pandemic.

Christiane speaks with two tennis greats, Billie Jean King and Andy Murray, to discuss gender equality and the impact of the pandemic on their sport,

Historian and documentary filmmaker Ken Burns says that in these fraught times, it's more important than ever for America to live by its motto, "E Pluribus Unum" -- "Out of Many, One." In fact, "UNUM" is the name of Burns' online resource for history buffs, an incredible compendium of his work across four decades. He joins the show from New Hampshire to explain what history can teach us.