Tim O'Brien has been hailed as one of the best American writers of his generation. His groundbreaking book "The Things They Carried" drew on his experiences during the Vietnam War and was a finalist for the Pulitzer Prize. A new documentary, "The War and Peace of Tim O'Brien," focuses on his work and his life as a father. He joins Christiane from Texas.

This week, the head of the World Health Organization said it was "shocking" how little had been done to combat vaccine inequality and added that the gap is "becoming more grotesque every day." The WHO's Chief Scientist, Dr. Soumya Swaminathan, joins Christiane from Geneva.

Why is the universe the way it is? How did life begin? And how might it end? Astrophysicist Neil DeGrasse Tyson has spent his life in search of the answers. His new book, "Cosmic Queries," was co-authored with physicist James Trefil. Tyson joins our Walter Isaacson to discuss the book and what drives his thirst to explore the really big questions of the universe.

The U.S. is reeling from its latest mass shooting, which took place yesterday in Boulder, Colorado. This is the country's 7th documented mass shooting in the past week, coming barely 6 days after 8 people in Atlanta were shot to death, including six women of Asian descent. Journalist Dave Cullen, who has written the definitive accounts of the Columbine and Parkland shootings, joins the program.

The pandemic rages on in the UK, and so too does a national epidemic of violence against women. The conversation was triggered by the abduction and murder of Sarah Everard in London earlier this month. British lawmaker Jess Phillips has a brief on domestic violence and protecting women as Shadow Minister for the opposition Labour Party. She joined Christiane from Birmingham.

The U.S. is reeling from its latest mass shooting, which took place yesterday in Boulder, Colorado. This is the country's 7th documented mass shooting in the past week, coming barely 6 days after 8 people in Atlanta were shot to death, including 6 women of Asian descent. Gun safety advocate Tom Mauser, whose son Daniel was killed in the 1999 Columbine High School shooting, joins the program.

As a young Japanese-American boy during World War II, actor and sci-fi legend George Takei was imprisoned with his family in the now infamous U.S. internment camps. He tells our Hari Sreenivasan about the history behind today's anti-Asian attacks as part of "Exploring Hate," our ongoing series of reports on antisemitism, racism, and extremism.

On World Water Day, we look at the shocking number of people who lack access to clean water. Four people in 10 worldwide do not have enough safe drinking water, and more than two billion live in countries where water shortages are the norm. Christiane is joined by Dutch photographer and anthropologist Sanne Derks, who has been documenting a crisis exacerbated by Cuba's famously patchy repair work

The Biden foreign policy team has their work cut out for them, as former Ambassador Bill Taylor knows all too well. He recently served as U.S. Ambassador to Ukraine and advised the U.S. Ambassador to NATO. He speaks with Christiane from Arlington, Virginia.

Where the vaccine rollout has been successful, a return to normality is on the horizon. But some may be wondering whether they remember what "normal" means. Christiane spoke with clinical psychologist Christine Runyan about that brain fog you may be feeling.

A woman in Turkey has been charged with murder for allegedly killing her husband in self-defense after years of abuse, torture and sexual assault. Christiane speaks with Elif Shafak, Turkey’s most popular female novelist and a women’s rights activist, about femicide and misogynistic violence.

Derek DelGaudio is a writer, magician and performance artist whose skillful displays of illusion and sleight of hand brought in the crowds for his Off-Broadway show "In and Of Itself," now adapted by Hulu for the small screen. He speaks with Michel Martin about card tricks and his new memoir "AMORALMAN," which follows his six-month stint as a crooked poker dealer.

Maryam Mirzakhani was the first woman, as well as the first Iranian, to be awarded a Fields Medal, the highest honor in mathematics, in 2014. Mirzakhani, who died at 40 from breast cancer in 2017, is the focus of a new biopic, "Secrets of the Surface." Her lifelong friend, math professor Roya Beheshti, speaks with Christiane about Mirzakhani’s legacy and her beautiful mind.

Israel heads to the polls yet again on Tuesday for its fourth election in two years. For the first time in Israeli history, polls are indicating that the Labor Party might be completely shut out in the election. This is the uphill battle facing the current leader, Merav Michaeli, who is also the only woman leading a major party into this election. She joins the show to discuss the issues at stake.

Transportation Secretary Pete Buttigieg views public transit as an equity issue tied to health and climate, as he explains to Walter Isaacson. Their conversation is part of Peril & Promise, the ongoing public media reporting initiative examining the challenges of and solutions to climate change.

A new poll shows Brazilian President Bolsonaro’s popularity at a record low after he ridiculed the pandemic, scorned lockdowns, and repeatedly attacked Brazil’s democratic institutions. Now his most formidable opponent, former President Lula da Silva, has joined the fray. Lula speaks with Christiane in a world exclusive interview, his first since his corruption conviction was overturned.

Residents in Jackson, Mississippi, spent a month without water, unable to wash, flush or drink, after the February winter storm turned the taps dry and forced a citywide “boil water” advisory. Today, restrictions finally were lifted and most of the city’s water system has been restored. But is the crisis really over? The city's mayor Chokwe Antar Lumumba joins the show to discuss.

Pro basketball player Jeremy Lin is best known for generating the craze “Linsanity” after he unexpectedly led a winning turnaround with the New York Knicks in 2012. Just before Tuesday's deadly attack in Atlanta, Lin spoke with Michel Martin about racism in sports and why he's choosing to speak out.

John Hume Jr. and Martin Luther King III join the program to reflect on the peace movement and their fathers' legacies.

The Biden administration faces the largest surge of migrants the U.S. has seen in 20 years, with border patrol apprehending nearly 100,000 asylum seekers in February, including around 10,000 unaccompanied minors. Elizabeth Neumann leads the Council on National Security and Immigration, which is making the case for bipartisan reform on this issue.