For more on Powell’s legacy, Bianna speaks with journalist Robert Draper, whose recent book "To Start a War" chronicled the decisions and key players that led to invasion.

The fall of Enron was a scandal that rocked the business world so hard that its aftershocks are still being felt 20 years later. The Texas energy giant was then the seventh largest company in the U.S., with a claimed revenue of over $100 billion. But beneath the surface, the company was concealing huge losses within a complex web of outside deals. What went wrong?

The inaugural Earthshot Awards were held in London this weekend to honor innovative solutions to the world’s most pressing environmental problems. Founded by Prince William and naturalist David Attenborough, Earthshot awarded a prize of more than $1.3 million to each of its five winners. Among them was Vaitea Cowan, honored for her group’s innovation of a compact electrolyzer.

Jack Straw was Powell’s British counterpart during the buildup to the Iraq War, serving as U.K. Foreign Secretary under Prime Minister Tony Blair. He joins the program to reflect on his friend’s legacy.

Andrew Yang ran for president in 2020 and for mayor of New York earlier this year. Now he's announced he’s leaving the Democratic Party entirely to launch a new party. The Forward Party shares its name with Yang's new book, which charts his experience in the 2020 presidential campaign. He speaks about the inspiration behind the book, his new party, and his vision for American politics.

Conservative MP Sir David Amess was stabbed multiple times at his constituency surgery, a regular session of one-on-one meetings between lawmakers and voters and a cornerstone of British democracy. A 25-year-old man has been arrested in connection with the killing, but the motive remains unclear. It is the second killing of a sitting U.K. lawmaker in five years.

The European Union is facing a number of pressing concerns right now -- from Afghanistan to the Iran nuclear deal to the threat of a Polish exit from the bloc. The EU’s foreign policy chief, Josep Borrell, joins the show from Washington D.C., fresh from a meeting with Secretary of State Antony Blinken.

Empty supermarket shelves. Soaring utility bills. Sky-high gas prices. The global energy crunch is hitting supply chains and consumers hard, interfering with the effort to recover from the pandemic and last year’s harsh winter. To discuss this and broader threats to the global economy, Christiane speaks with New York Times columnist and Nobel Prize-winning economist Paul Krugman.

Julie Delpy aspires to change our outlook on aging with her new series "On the Verge," celebrating the changing lives of four female friends living and working in Los Angeles – all on the verge of middle age. The show clearly struck a chord. In its debut episode it made Netflix's list of top ten shows. Delpy joins the show from L.A. to discuss the series and what inspired her to make it.

Dave Grohl is best known as the Foo Fighters' front man and former Nirvana drummer. In his newly released memoir "The Storyteller," the 16-time Grammy winner relates his story of growing up in Washington, D.C., touring as a teenager, and his friendship with the late Kurt Cobain. Grohl speaks with Hari Sreenivasan about grief -- and finding rhythm in unusual places.

As the world grapples with the humanitarian fallout in Afghanistan, former four-star U.S. General Stanley McChrystal is watching it unfold knowing all too well what's on the line. McChrystal was the Commander of American and coalition forces in Afghanistan. He drew on this experience in his new book, "Risk: A User's Guide." He joins Walter Isaacson to discuss the major global threats.

Afghanistan, home to 38 million people, is running out of food and money. The White House is making it clear it wants to provide assistance directly to the Afghan people. Joining Christiane is Fawzia Koofi, a former Afghan politician who was part of the team negotiating with the Taliban, and -- from Kabul -- Mary-Ellen McGroarty, the World Food Programme's Director for Afghanistan.

Columbia law professor Kimberlé Crenshaw is world-renowned for her work on racism and sexism in America. Preeminent in her field, she coined the term "intersectionality" back in 1989. In a recent essay for The New York Times, "How R. Kelly Got Away With It," Crenshaw argues that the R&B star was able to dodge justice for so long because of a "societal disregard for Black women.

We turn to two Hollywood brothers who made their names in some of America's best-loved family classics. Ron and Clint Howard were the child stars of hit shows like "Happy Days" and "Gentle Ben." You might not know Clint as well as Ron, but both had successful performing careers. Despite that, it's their decades of brotherhood that they've chosen to celebrate in their new joint memoir "The Boys."

Feldstein stars in the latest dramatized version of a story that grabbed global headlines and led to the impeachment of then-President Bill Clinton. "Impeachment: American Crime Story" on FX has the full backing of Monica Lewinsky herself, the central figure in this real-life drama. Onscreen Lewinsky is played by actress Beanie Feldstein, best known for her roles in "Ladybird" and "Booksmart."

Doctors Ugur Sahin and Özlem Türeci changed the course of history when their company BioNTech, alongside Pfizer, developed the first clinically approved COVID-19 vaccine. The shot was found to be 90% effective in preventing disease. The work of doctors Sahin and Türeci has saved countless lives. The doctors now turn their focus to booster shots and to deadly diseases like malaria and tuberculosis.

In its 138-year history, the Metropolitan Opera has never hosted a performance by a Black composer -- until now. Terence Blanchard's new work is based on a 2014 memoir by New York Times columnist Charles Blow. The composer speaks with Walter Isaacson about his artistic process.

In just three weeks, world leaders meet in Glasgow for the COP26 climate conference, where they'll reckon with a dispiriting report from the United Nations showing that the world is warming faster than scientists previously thought. Danish Prime Minister Mette Frederiksen is on a state visit in New Delhi now, to convey the urgency of the climate crisis.

"Polexit," anyone? The term is tentatively being bandied about since tensions in Poland reached boiling point over EU membership. Meanwhile in the U.K., home of "Brexit," the economic chickens are coming home to roost with food industry supply chains in utter chaos. Michel Barnier, the EU's unflappable Brexit negotiator, has laid out his experience in a new book called "My Secret Brexit Diary."

A new ProPublica article by journalist Sarah Smith caught our eye with this warning: "We are losing our humanity." Visualize school meetings turning toxic over masks, and medical centers disrupted by violence. Is the new reality fundamentally altering our behavior and the way we interact? If so, what will the lasting impact be? To help unpack all this, we're joined by sociologist Eric Klinenberg.