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Sounds leave cues about the wear and tear on cars, power tools and other devices. By identifying the sounds a startup aims to improve the repair and performance of vehicles, traffic signals and more.

-- David Hecht reports that on Sunday, the West African nation of Senegal holds its parliamentary elections. During President Clinton's recent visit to the nation, a White House official described Senegal as a "brisk and vigorous" democracy. However, the ruling Socialist Party has won every election since its established independence from France in 1960, and this Sunday is expected to be no different. Critics say the Socialist Party's perpetual rule raises questions about the country's democracy.

David Margolis died Tuesday after serving 51 years at the Justice Department. In those years, he touched nearly every major case and controversy.

A huge collection of Salvador Dalí's art is now open in a former history museum in Monterey, Calif. It's the work of real estate mogul Dmitry Piterman, who has amassed more than 570 Dalí pieces.

Amid an attack by Iran, President Biden vows continued support for Israel and House leaders say they'll take up an aid package this week.

NPR's Ayesha Rascoe talks with Ali Vaez of the International Crisis Group about Iran's objectives in launching what Tehran said was a retaliatory drone and missile strike against Israel.

With the Republican National Convention Rules Committee meeting this week, forces opposed to Donald Trump are trying to get rules passed that allow delegates to "unbind" themselves from the candidate.

NPR's Rachel Martin talks to John Sopko, special inspector general for Afghanistan reconstruction, about what the U.S. investment there has achieved.

Health workers have made some large strides against polio but getting to zero is elusive. There's violence against workers and anti-vaccination advocates use social media to frighten parents.

The Federal Reserve targets an inflation rate of 2 percent. Why 2 percent? And how close are we to the target?