PBS NewsHour - Segments

President Trump said Thursday that he wants to send as many as 4,000 National Guard troops to secure the U.S.-Mexico border. While his plan has raised concerns, there is precedent from past administrations. John Yang speaks with former ICE acting director John Sandweg and former Department of Homeland Security adviser Theresa Cardinal Brown about decision to deploy troops, then and now.

Social media giant Facebook says it now believes that up to 87 million people had their data improperly shared with Cambridge Analytica, the political consulting firm that worked for the Trump campaign, and that public profiles for most of the platform's 2 billion users were likely accessed by outsiders without explicit permission. John Yang reports.

Facebook Chief Operating Officer Sheryl Sandberg apologized Thursday for the social media giant’s data breach and admitted the company failed to do enough to protect the data of tens of millions of its users. In an interview with Judy Woodruff, Sandberg acknowledged the company “under-invested” in the safety and security of user data and said Facebook is now working to rectify that.

All eyes are on Tiger Woods as he's set to compete in his first Masters tournament since 2015 -- a comeback many thought would never happen. The youngest player ever to win the coveted green jacket and one of the greatest athletes of his era, his career also took an ugly fall. His story is told in a new best-selling biography by co-author Armen Keteyian, who joins Jeffrey Brown for an interview.

In Martin Luther King Jr.’s final days, he traveled to Memphis to lend his voice to the city's black sanitation workers, who were protesting poor working conditions. Fred Davis, who helped negotiate an end to the strike, marched with King and was in the room for his final, iconic speech, delivered the night before his assassination. Davis talks with Judy Woodruff about the continuing struggle.

In our NewsHour Shares moment of the day, this self-taught paleontologist has been looking for dinosaurs in creek beds and rivers for more than 30 years, and has become something of a legend in the field. Then, outside a NASA building, he hit the jackpot: over 100 tracks belonging to numerous mammals, dinosaurs and flying reptiles.

Anna Deavere Smith, actor, playwright and activist, says she has been trying to become America, word for word. By conducting interviews and creating a narrative, she aims to make a current problem come alive. Deavere Smith offers her Brief but Spectacular take on listening to people.

China counterpunched with new tariffs against U.S. products in the latest round of an escalating trade fight between the world's two largest economies. The Chinese announced plans for 25 percent tariffs on a list of American goods, including soybeans, cars and chemicals, mirroring a Trump administration action hours earlier. Lisa Desjardins reports.

In our news wrap Wednesday, President Trump moved to have governors deploy the National Guard at the U.S.-Mexico border. Also, the White House underscored the president’s message that the U.S. military's mission in Syria is coming to a "rapid end," but stopped short of giving a specific timetable for a troop withdrawal.

Students-turned-activists from Marjory Stoneman Douglas High School were in the halls of Congress on Tuesday to press for more gun control. Senate Republicans pointed to a bill that would push more agencies to work with the background check system. But Democratic Senate Leader Chuck Schumer says that doesn't go far enough. Lisa Desjardins joins Judy Woodruff for more.

In our news wrap Tuesday, Admiral Mike Rogers, head of the NSA and U.S. Cyber Command, said he has not received orders to strike directly against Russian cyber attackers accused of meddling in the last election. Also, there's word that North Korea may be helping Syria's government make chemical weapons. The New York Times reported a UN investigation found suspect shipments sent from the North.

Jared Kushner, President Trump’s son-in-law and senior advisor, has been stripped of his top security clearance. That move comes after revelations about Kushner and other top officials at the White House working without permanent clearances. Judy Woodruff learns more from Washington Week host and Washington Post reporter Robert Costa.

A case involving Microsoft and overseas data puts a familiar tech issue before the Supreme Court: the balancing act between the interests of law enforcement and personal privacy. Marcia Coyle of The National Law Journal joins Judy Woodruff to break down that case, as well as the justices’ ruling on the detainment of undocumented immigrants.

President Trump, a number of other Republicans and the NRA have ramped up calls for arming teachers. But it's an idea that generating a lot of criticism among educators. Jason Villalba, a Texas state representative and the architect of the school marshal program that allows Texas school districts to train and arm teachers, joins John Yang to discuss how it works.

What do teachers think of calls from President Trump and others for arming educators as a response to mass shootings at schools? Becky Pringle of the National Education Association joins John Yang to share opposition to the proposal and why many teachers can’t imagine the responsibility of carrying a firearm in the classroom.