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Live from NPR News in Washington, I'm Jack Spear.

President Donald Trump is defending his national security advisor,

Mike Walts, following the inadvertent inclusion of a journalist in a messaging app group

about a U.S. attack on Yemen.

Trump also repeating assertions, no classified information was involved.

Two Trump intelligence officials who were part of that chat appeared before the Senate Intelligence Committee this morning for a hearing on worldwide threats.

Virginia Democrat Mark Warner sits on the committee in an interview with NPR

says the security lapse is not a trivial matter. Because if it had gotten out, Americans could have died

in terms of the hoodies being able to reconfigure or redirect their defensive capabilities.

This is kind of security 101. If this had been a military officer or a CIA case officer, they would be fired.

Warner has called for the release of all the material from the chat if indeed it is not classified.

Mike Walts, for his part, slammed the Atlantic and the media over their focus on the matter.

A federal judge is ordering the Trump administration to back off its pursuit of a

Columbia University student who participated in pro-Palestinian protests. And as Adrian Fulito reports,

immigration agents have been trying to arrest her for weeks. Junseo Chung is a 21-year-old South

Korean National who's lived in the U.S. since she was seven. She's a legal permanent resident.

On March 5th,

she was one of several students that New York police arrested at a pro-Palestin protest at a campus building. She was cited and let go. Her lawyers say that days later, ICE agents showed up

...