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Walter Carr didn't panic, he made a plan.

AI Innovators Take Pledge Against Autonomous Killer Weapons

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The Terminator's killer robots may seem like a thing of science fiction. But leading scientists and tech innovators have signaled that such autonomous killers could materialize in the real world in frighteningly real ways.

During the annual International Joint Conference on Artificial Intelligence in Stockholm on Wednesday, some of the world's top scientific minds came together to sign a pledge that calls for "laws against lethal autonomous weapons."

When people think of particle accelerators, they tend to think of giant structures: tunnels many miles long that electrons and protons race through at tremendous speeds, packing enormous energy.

But scientists in California think small is beautiful. They want to build an accelerator on semiconductor chips. An accelerator built that way won't achieve the energy of its much larger cousins, but it could accelerate material research and revolutionize medical therapy.

First of all, what is an accelerator?

Former White House press secretary Sean Spicer has words of praise for Sarah Sanders, his successor on the podium, and says she has figured out how to please President Trump in the job in a way he struggled to do.

"I think Sarah has done a great job of making sure that she understands what the president wants," Spicer told NPR's Mary Louise Kelly in an interview on Wednesday in advance of next week's release of his book The Briefing: Politics, the Press and the President.

More than a year after a landslide shut it down, a section of Highway 1 running along a coastal stretch in California's Big Sur region reopened early Wednesday.

The California Department of Transportation announced that the roadway at Mud Creek was opening about two months ahead of schedule, thanks to favorable weather and worker productivity.

"It's a big deal to open the highway unrestricted," Colin Jones, a Caltrans spokesman told NPR.

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