Prosecutors said samples of the alleged nuclear material was weapons-grade, meaning enough of it would be suitable for use in a nuclear weapon.

Firefighters battle several wildfires in the LA area, hundreds of dignitaries to gather for former President Carter's state funeral, and Republicans set a course for Trump's legislative agenda.

Multiple wildfires are burning in Los Angeles, fueled by Santa Ana winds. NPR speaks with a National Weather Service meteorologist about why these winds can be so dangerous and destructive.