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President Trump hosted Ukraine's Volodymyr Zelenskyy and key European leaders at the White House. But questions still remain around serious peace negotiations to end the Russia-Ukraine war.

In January, a lithium-ion battery-storage plant in Monterey County, Calif., caught fire and burned for days, prompting evacuations and school shut downs. Residents are concerned about their health.

Tyler Childers bares his fangs. Patty Griffin honors her mother. Indigo De Souza approaches the precipice. Read our list of the best records out July 25.

Despite missteps on the campaign trail, former Vice President Joe Biden continues to retain support among key Democratic voter groups, but Bernie Sanders and Elizabeth Warren aren't far behind.

The nation's top spy will face questions about the whistleblower complaint that led to a formal impeachment inquiry into President Trump.

Jeff Hawkins created the PalmPilot and Treo smart phone. His new company, Numenta, is developing a type of computer memory system modeled after the human neocortex, what he calls the "the big wrinkly thing" at the top of the brain. He's also the co-author of the book On Intelligence, which details his vision of how the brain processes information.

I. Lewis Libby, Vice President Dick Cheney's former top aide, pleads not guilty to charges against him in a case probing who revealed the identity of a covert CIA agent. He was arraigned in federal court in Washington, D.C., on charges of obstructing justice, perjury and making false statements.

Defense Secretary Donald Rumsfeld announces a reduction in the number of U.S. troops in Iraq. Rumsfeld said the number of U.S. combat brigades in Iraq will be cut to 15 from 17. The top ground commander in Iraq, Gen. George Casey, also said he could advise further cuts in troop levels by spring.

Media watchers say recent book and film trends suggest a "perfect storm" of politically motivated popular culture, which has been building for years. Books from the left and right top best-seller lists, while films like Fahrenheit 9/11 draw box-office crowds. Hear NPR's Lynn Neary.

Right at the top of a list of the country's most endangered rivers is New Mexico's Santa Fe. The American Rivers group says the river must be cleaned up — and it shouldn't be siphoned off for other purposes, either.