When the United Kingdom voted to leave the European Union last month, the seaside town of Port Talbot in Wales eagerly went along with the move. Brexit was approved by some 57 percent of the town's residents.

Now some of them are wondering if they made the wrong decision.

The June 23 Brexit vote has raised questions about the fate of the troubled Port Talbot Works, Britain's largest surviving steel plant — a huge, steam-belching facility that has long been the town's biggest employer.

Solar Impulse 2 has landed in Cairo, completing the penultimate leg of its attempt to circumnavigate the globe using only the power of the sun.

The trip over the Mediterranean included a breathtaking flyover of the Pyramids. Check it out:

President Obama is challenging Americans to have an honest and open-hearted conversation about race and law enforcement. But even as he sits down at the White House with police and civil rights activists, Obama is mindful of the limits of that approach.

"I've seen how inadequate words can be in bringing about lasting change," the president said Tuesday at a memorial service for five law officers killed last week in Dallas. "I've seen how inadequate my own words have been."

Mice watching Orson Welles movies may help scientists explain human consciousness.

At least that's one premise of the Allen Brain Observatory, which launched Wednesday and lets anyone with an Internet connection study a mouse brain as it responds to visual information.

The FBI says it is giving up on the D.B. Cooper investigation, 45 years after the mysterious hijacker parachuted into the night with $200,000 in a briefcase, becoming an instant folk figure.

"Following one of the longest and most exhaustive investigations in our history," the FBI's Ayn Dietrich-Williams said in a statement, "the FBI redirected resources allocated to the D.B. Cooper case in order to focus on other investigative priorities."

This is the first in a series of essays concerning our collective future. The goal is to bring forth some of the main issues humanity faces today, as we move forward to uncertain times. In an effort to be as thorough as possible, we will consider two kinds of threats: those due to natural disasters and those that are man-made. The idea is to expose some of the dangers and possible mechanisms that have been proposed to deal with these issues. My intention is not to offer a detailed analysis for each threat — but to invite reflection and, hopefully, action.

Alabama authorities say a home burglary suspect has died after police used a stun gun on the man.  Birmingham police say he resisted officers who found him in a house wrapped in what looked like material from the air conditioner duct work.  The Lewisburg Road homeowner called police Tuesday about glass breaking and someone yelling and growling in his basement.  Police reportedly entered the dwelling and used a stun gun several times on a white suspect before handcuffing him.  Investigators say the man was "extremely irritated" throughout and didn't obey verbal commands.

It can be hard to distinguish among the men wearing grey suits and regulation haircuts on Pennsylvania Avenue in Washington. But David Margolis always brought a splash of color.

It wasn't his lovably disheveled wardrobe, or his Elvis ring, but something else: the force of his flamboyant personality. Margolis, a graduate of Harvard Law School, didn't want to fit in with the crowd. He wanted to stand out.

Montgomery Education Foundation's Brain Forest Summer Learning Academy was spotlighted Wednesday at Carver High School.  The academic-enrichment program is for rising 4th, 5th, and 6th graders in the Montgomery Public School system.  Community Program Director Dillion Nettles, says the program aims to prevent learning loss during summer months.  To find out how your child can participate in next summer's program visit Montgomery-ed.org

A police officer is free on bond after being arrested following a rash of road-sign thefts in southeast Alabama.  Brantley Police Chief Titus Averett says officer Jeremy Ray Walker of Glenwood is on paid leave following his arrest in Pike County.  The 30-year-old Walker is charged with receiving stolen property.  Lt. Troy Johnson of the Pike County Sheriff's Office says an investigation began after someone reported that Walker was selling road signs from Crenshaw County.  Investigators contacted the county engineer and learned signs had been reported stolen from several roads.

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Key To E. Coli-Free Spinach May Be An Ultrasonic Spa Treatment

Nov 29, 2012

Salad producers haven't succeeded in banishing E. coli and other dangerous microbes from fresh greens, though they've tried hard. As we've reported before, it's a major challenge to both growers and the environment. But one scientist thinks he's making progress – with a spinach spa that zaps bad bugs with ultrasound.

Ultrasound is nothing more than sound moving at a frequency too high for humans to hear. It's commonly used for medical tests, including those adorably fuzzy photos of babies in the womb. Turn up the intensity, though, and ultrasound can pack enough power to destroy bacteria. Ultrasound is increasingly used in food production, and has been used successfully to decontaminate other fresh foods, including apple juice. But using ultrasound on greens has had only mixed success.

"Leafy greens are difficult," says Hao Feng, an associate professor of food engineering at the University of Illinois who built the spinach spa. Zap a spinach leaf too hard, and it develops watery spots and rots. Zap it too little, and the germs live. "We need to be very careful. We don't want to damage this produce."

Yet a spinach leaf, delicate though it is, can block ultrasound waves from reaching bacteria behind it.

Feng tried to overcome these problems by submerging the spinach in a big trough of water, much like the tanks used to wash fresh greens for commercial production. He added Jacuzzi-like jets to move the water, so all the spinach gets exposed to about the same amount of sound waves. ) And he used transducers that were as deep and long as the tank to generate sound waves throughout.

As the sound waves move through water, they make areas with high and low pressure. That creates tiny cavities that pop like bubbles. That cavitation process can dislodge and destroy bacteria – or it can destroy the spinach. So Feng had to tweak his machine to cause just enough cavitation, but not too much.

Then he combined ultrasound and a time-tested industry technique – washing fresh greens in a solution of chlorine and water. That resulted in a tenfold reduction in E. coli, compared to a chlorine wash alone. The results were reported in the journal Innovative Food Science and Emerging Technologies.

Feng is confident he could invent a machine that would work on a commercial scale, but it would cost more than the chlorine-only treatment many processors use now, and so far no one's expressed interested in funding commercial development of his spinach spa.

"We have finished the first step," Feng told The Salt. He next hopes to re-rig his system to disinfect microgreens next.

Copyright 2012 National Public Radio. To see more, visit http://www.npr.org/.