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Thousands of hackers probed AI chatbots for misinformation, bias and security flaws at the annual Defcon hacking convention in Las Vegas to see how easy is it to make the AI go off the rails.

Previous efforts to elect a House speaker have failed at the floor vote. As the search stretches into a third week, Rep. Mike Flood wants Republicans to commit to voting for their party's nominee.

Former President Donald Trump is escalating his attacks on President Biden in another sign his campaign is looking past the Republican primaries — and focusing more on the general election ahead.

Antony Blinken is meeting with Israeli leaders in Tel Aviv as part of his Mideast visit aimed at containing the war in Gaza, and preventing a wider conflict.

Boeing CEO Dave Calhoun got grilled by senators on Capitol Hill. It was his first public testimony since a door plug panel blew out of a Boeing 737 Max jet in midair in January.

Michelle Obama urged Democrats to do all they can to win. Barack Obama asked delegates to “listen” to voters who aren’t ready yet. VP nominee Minnesota Gov. Tim Walz addresses the DNC Wednesday night.

Illinois Gov. JB Pritzker was passed over in the Harris campaign veepstakes. How has the billionaire navigated the party and what might he win or lose at the Democratic National Convention in Chicago?

Israel's military says it's expanded its Gaza ground offensive and is now targeting Hamas strongholds across the Gaza strip. It's also telling more Gazans to flee some areas in order to avoid strikes.

NPR's Andrew Limbong speaks with Suzanne Maloney of the Brookings Institution about relations between Iran and Israel.

NPR's Michel Martin talks to former MotoGP rider John Hopkins about what the proposed takeover of the sport by Formula One owners Liberty Media, could mean for the future of motorcycle racing.