The world’s fresh water is disappearing thanks to climate change and growing demand. Mina Guli was a corporate lawyer in a former life, but she quit her job, founded the non-profit “Thirst” and took to the road, running marathons to raise awareness about our dwindling drinking water. She managed to slow down for just a moment to speak with Hari Sreenivasan in New York.

In his new book, “Dying of Whiteness,” physician Jonathan Metzl details the dire consequences of some right wing policies for the populations they claim to help. From gun control to healthcare, Metzl finds that some white Americans would rather die than betray the politics of their identity.

In the age of alternative facts, taking aim at dodgy data has never been more important. And while statistics can be baffling and even misleading, Sir David Spiegelhalter, Cambridge University Professor and author of “The Art of Statistics,” tells Christiane it’s all about the context and quality of stats.

Admiral Mike Mullen is a true public servant, serving over four decades in uniform and as the top military advisor to Presidents George W. Bush and Barack Obama. Renowned for his role in dismantling the military's “don’t ask, don’t tell” policy, overseeing the end of combat in Iraq, and more, he joins Walter for a discussion on political courage and morality and the future of American institutions

Alicia Menendez sits down with Gaby Dunn, author of “Bad with Money,” to discuss millennials and the stigma surrounding personal finances.

Walter Isaacson sits down with Republican strategist Frank Luntz to discuss the toxic rhetoric in America’s politics, and why he’s given up hope for a united America.

Michel Martin sits down with the youngest woman to serve as White House Deputy Chief of Staff, Alyssa Mastromonaco, to discuss her new memoir, career and the new class of women making waves in Congress.

Alicia Menendez sits down with founder of Backstage Capital, Arlan Hamilton, whose venture capital firm is dedicated to investing in start-ups founded by women and people of color. They discuss the changing face of entrepreneurship, "pattern-matching," and Arlan's changing role in her company moving forward.

Alka Pradhan is the defense attorney fighting for a 9/11 prisoner’s rights, as seen in a rare look inside Guantanamo Bay in Johanna Hamilton’s documentary, “The Trial.” They discuss why forty detainees are currently held in indefinite custody.

When a young girl was raped by two football stars in Steubenville, Ohio, in 2012, the town was thrust into the national spotlight. Director of documentary “Roll Red Roll,” Nancy Schwartzman, discusses what we can learn from the reckoning that followed.

The college admission bribery scandal revealed an uncomfortable truth about America’s higher education system: it isn’t fair. Michel Martin speaks to Daniel Golden, the author of “The Price of Admission,” about what college hopefuls face when choosing the school of their dreams.

Hari Sreenivasan sits down with Francisco Cantú, a third generation Mexican-American and former border patrol agent. He discusses his new book "The Line Becomes a River," and the brutality along the landscape he loves.

Michel Martin sits down with author of “American Prison,” Shane Bauer. After being released from Iran’s notorious Evin prison, investigative reporter chose a surprising assignment: going undercover as a prison guard in Louisiana. He discusses the brutality of life behind bars.

As two leaders seen to spurn traditional alliances, President Donald Trump and Brazilian President Jair Bolsonaro, meet at the White House, veteran US diplomat and former Deputy Secretary of State, William Burns, discusses the value of diplomacy. It’s a case he makes in his new book “The Back Channel,” tracing his involvement in some of the most consequential events in recent history.

Walter Isaacson sits down with Bruce Springsteen’s wing man, actor and musician “Little Steven” Van Zandt.

Michael Sandel, a political philosophy professor at Harvard, argues society is losing its ability to reason on key issues in the political arena.

As New Zealand reels from the worst terror attack in its history and police arrest a suspect from Australia, Kevin Rudd, former Australian Prime Minister, speaks to Christiane Amanpour.

Following the tragic terrorist attack in New Zealand, Peter Neumann, the founding director of the International Centre for the Study of Radicalisation and Political, and Jonathan Greenblatt, CEO of the Anti-Defamation League, discuss what is fueling these deadly attacks by far-right extremists.

As students skip school in thousands of cities around the world to demand action on climate change, correspondents Bill Weird and Atika Shubert join the program live from the field to set the scene and discuss.

Award-winning author Laurie Halse Anderson discusses how sexual abuse can shame many into silence, and why she named her new memoir recounting her own personal experience with sexual abuse, “Shout.” Anderson's first book, "Speak," a teen fiction novel about a rape survivor, was a worldwide phenomenon and sent her on a speaking tour of high schools around the U.S. to talk about sexual assault.