PBS NewsHour - Segments

To understand the history of climate change, researchers are digging underneath the ocean floor where organisms and plants have accumulated in sediment over millennia. Maureen Raymo studies this science of paleoclimatology using a vast collection of materials at Columbia University’s Lamont-Doherty Earth Observatory. NewsHour Weekend's Hari Sreenivasan reports.

The gunman accused of killing 49 people at two New Zealand mosques Friday live-streamed the attack, emailed his manifesto to media outlets, and shared his racist and hateful messages online. Charlie Warzel, opinion writer-at-large for The New York Times and Joan Donovan of Harvard University join Hari Sreenivasan to discuss changing technology and the media's role and responsibilities.

Christchurch, New Zealand’s second-largest city, was the site of horrific carnage Friday, as a gunman stormed two mosques during Friday prayers, killing at least 49 people and injuring dozens more. Police arrested the alleged shooter, who cited other mass killings as inspiration. Amna Nawaz reports on what New Zealand Prime Minister Jacinda Ardern called one of the country’s “darkest days.”

Deadly terror attacks in New Zealand Friday caused global shock, but the extreme anti-immigrant, white supremacist ideology of the suspected Australian gunman is not new. Judy Woodruff talks to Humera Khan of Muflehun, a nonprofit fighting hate and extremism, University of Chicago’s Kathleen Belew and Matthew Knott of the Sydney Morning Herald about the scope of this malignant "social movement."

In our news wrap Friday, President Trump cast the first veto of his administration. The action was in response to Congress’ resolution to block Trump’s national emergency declaration over immigration at the U.S. border with Mexico. Meanwhile, North Korea is warning the U.S. that it may restart missile launches and nuclear tests in the wake of failed negotiations in Hanoi last month.

A crowded field of Democratic 2020 presidential candidates now includes former Texas Rep. Beto O’Rourke, who campaigned in Iowa this week, trying to appeal across party lines. Also in Iowa was entrepreneur Andrew Yang, who just became eligible to participate in Democratic debates. Still, a major question remains unanswered: will popular former Vice President Joe Biden run? Lisa Desjardins reports.

Syndicated columnist Mark Shields and New York Times columnist David Brooks join Judy Woodruff to analyze the week's news, including hate and tragedy in New Zealand, President Trump’s aggressive and “reckless” rhetoric and the latest updates from the field of 2020 Democratic presidential candidates.

For decades, Dawoud Bey has been considered one of the country’s foremost street photographers, known for capturing the everyday lives of black Americans with a deep intimacy. Recently, Bey has shifted his focus to the historical, with an exploration of how the world might have appeared to fugitive slaves on the Underground Railroad. Jeffrey Brown talks to Bey about “making the invisible visible.”

With his series of crayon works, Ohio artist Christian Faur is not only creating photorealistic portraits out of art supplies traditionally relegated to children, but he’s also making the crayons from scratch. Jackie Shafer of WOSU in Columbus has this look at the unique and “ridiculously labor-intensive” medium in which Faur does much of his work.

The Senate defied President Trump on Thursday, with 12 Republicans helping form a decisive majority to block his declaration of a national emergency over immigration. But the 59-41 vote wasn't a large enough majority to overturn a veto, and Trump vowed immediately to use one--the first of his presidency. Judy Woodruff talks to Lisa Desjardins and Yamiche Alcindor about the "stunning rebuke."

The House voted unanimously Thursday that special counsel Robert Mueller's forthcoming report must be made public. The non-binding resolution is intended to pressure Attorney General William Barr to release as much information as possible, but it's unclear if the Senate will take it up. Also, former Rep. Beto O’Rourke, D-Texas, is officially running for the 2020 Democratic presidential nomination.

Former Sen. Birch Bayh, who served three terms as an Indiana Democrat, died Thursday at his home in Maryland. Bayh was the primary architect of Title IX, which bars sex discrimination in colleges, and the 25th Amendment, which empowers presidents to fill vice presidential vacancies and outlines a procedure for declaring sitting presidents unfit. John Yang remembers the influential legislator.

The United Kingdom's political crisis over how to exit the European Union continues. This week, Parliament rejected the option to leave without an agreement, and on Thursday, it voted to delay Brexit for three months. If the EU grants the extension, will it offer Prime Minister Theresa May a "lifeline?" Foreign affairs correspondent Nick Schifrin talks to Peter Spiegel of the Financial Times.

An explosive scandal around bribery and cheating in college admissions has prompted new questions about access, race and inequality in elite higher education. Judy Woodruff explores some of them with Daniel Golden, senior editor at ProPublica and author of a book on the unfairness of college admissions, and Rashad Robinson, president of Color of Change, an organization focused on racial justice.

Extreme winter weather in the Midwest has left at least 15 people dead. Power outages and extreme stress on utility systems added to worries in Chicago and Detroit, while in Wisconsin, emergency shelters sought to offer the homeless refuge from the cold. A respite from the record-breaking deep freeze is expected this weekend, as the cold air moves east. Amna Nawaz has more on the weather crisis.