Police in Baton Rouge say they have arrested three people who stole guns with the goal of killing police officers. They are still looking for a fourth suspect in the alleged plot, NPR's Greg Allen reports.

"Police say the thefts were at a Baton Rouge pawn shop early Saturday morning," Greg says. "One person was arrested at the scene. Since then, two others have been arrested and six of the eight stolen handguns have been recovered. Police are still looking for one other man."

A 13-year-old boy is among those arrested, Greg says.

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After an international tribunal invalidated Beijing's claims to the South China Sea, Chinese authorities have declared in no uncertain terms that they will be ignoring the ruling.

The Philippines brought the case to the Permanent Court of Arbitration in The Hague, objecting to China's claims to maritime rights in the disputed waters. The tribunal agreed that China had no legal authority to claim the waters, and was infringing on the sovereign rights of the Philippines.

Donald Trump is firing back at Supreme Court Justice Ruth Bader Ginsburg after she made disparaging comments about him in several media interviews. He tweeted late Tuesday that she "has embarrassed all" with her "very dumb" comments about the candidate. Trump ended his tweet with "Her mind is shot - resign!":

Donald Trump wrapped up his public tryout of potential vice presidential candidates in Indiana Tuesday night with Gov. Mike Pence giving the final audition.

The Indiana governor's stock as Trump's possible running mate is believed to be on the rise, with New Jersey Gov. Chris Christie and former House Speaker Newt Gingrich also atop the list. Sources tell NPR the presumptive GOP presidential nominee is close to making a decision, which he's widely expected to announce by Friday.

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The unassuming hero of Jonas Karlsson's clever, Kafkaesque parable is the opposite of a malcontent. Despite scant education, a limited social life, and no prospects for success as it is usually defined, he's that rarity, a most happy fella with an amazing ability to content himself with very little. But one day, returning to his barebones flat from his dead-end, part-time job at a video store, he finds an astronomical bill from an entity called W.R.D. He assumes it's a scam. Actually, it is more sinister-- and it forces him to take a good hard look at his life and values.

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Donald Trump picked a military town — Virginia Beach, Va. — to give a speech Monday on how he would go about overhauling the Department of Veterans Affairs if elected.

He blamed the Obama administration for a string of scandals at the VA during the past two years, and claimed that his rival, Hillary Clinton, has downplayed the problems and won't fix them.

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Gold Miners Dig Deep — To The Ocean Floor

Apr 2, 2012

Filmmaker James Cameron recently reminded us of the wonders of the sea by diving solo in a submarine to the deepest spot in the ocean. Next year, if all goes as planned, a rather different expedition will take place 1,000 miles south of that dive: An Australian company will start mining for copper, gold, silver and zinc on the seafloor off the shore of Papua New Guinea.

People have thought about mining the seafloor's mineral wealth for many decades. But now, a combination of high metal prices and sophisticated technology is making that possible.

Nautilus Minerals of Australia has a license from Papua New Guinea to mine a site the size of 21 football fields for its rich deposits. The minerals are found there in very high concentrations, because a natural hot spring on the seafloor has been laying them down for thousands of years.

Samantha Smith, the vice president for corporate responsibility at the company, says it's an operation that involves remotely piloted vehicles prowling around a mile under the surface.

"You have two machines that cut, and they do different kinds of cuts," she says. These tools have large grinding wheels and other devices to break up the rock at the seafloor, which is similar in hardness to concrete. "And then you've got a third machine that goes along and effectively sucks the material up from the seafloor."

The material is drawn into a long pipe, similar to the kind used in deep-sea oil drilling. This riser pipe brings slurry to ships on the surface, and the mineral-rich material is hauled to shore. The mineral-rich wastewater that comes up the pipe is filtered and pumped back to the seafloor. That way, it won't harm tuna, which swim closer to the surface, and which commercial fishermen depend upon.

And if it seems like a hassle to do all this offshore, Smith says think of the alternative — mining on land. "You've got to dig a big hole in the ground to get to the ore body. And you might even have to remove a mountain and then dig a big hole in the ground to the ore body," she says.

Offshore, you aren't forcing people off their land to dig mines, and you aren't contaminating rivers and streams.

"There's a potential environmental advantage, and really that's where the industry got a kick start," she says. Of course, the sharply rising value of metals like copper and gold has also made the big expense of this kind of operation worthwhile.

But the same natural hot springs that have deposited all that mineral wealth on the seafloor also support marine life like marine snails, says Cindy Van Dover, a marine biologist at Duke University.

"To a biologist, they're beautiful," she says. "They have symbiotic bacteria that live inside their gills, and those bacteria supply the food energy that drives the community of animals that lives there. So in an otherwise relatively depauperate deep sea, these habitats are generally pretty rich oases of life."

An Environmental Experiment

Van Dover is among the scientists that Nautilus Minerals has been consulting in its attempt to limit the environmental damage. She says you can think of mining as a very aggressive experiment: What happens when you carve away the natural chimneys made of these minerals and grind down the surrounding rock?

"We know these systems are often exposed to disturbances," she says. "The chimneys fall down and there are volcanic eruptions in some places. So the animals are adapted to recolonizing new spaces fairly quickly, we think."

It's possible the marine life will be back in a year, she says. But that could prove to be far too optimistic. The company will leave some parts of the area undisturbed so animals there can potentially recolonize the site after the 30-month mining period is over.

"I don't like the thought of messing up a pristine environment," Van Dover says. "I would rather see the deep sea stay unimpacted by human activities. But that's not a very rational view."

But George Woodwell, a scientist who founded the Woods Hole Research Center in Woods Hole, Mass., has a much more visceral reaction to destroying any deep-ocean hot spring.

"The organisms that have evolved to inhabit them are specially adapted to those places. And they are well worth examining, looking at them. They are one of the wonders of the Earth to be preserved, as far as I'm concerned," Woodwell says.

He argues it's time to stop degrading the Earth to sustain our consumptive lifestyles. "So I don't have any sympathy for the idea that we should be mining the seafloor in this late stage in the development of our industrial society. We've got to be more mature than that."

Smith, from Nautilus Minerals, says our hunger for metals keeps growing, so mining is bound to happen somewhere.

"What we're looking at here is more of a holistic view, that maybe going to the seafloor makes environmentally and socially a lot more sense," she says.

The mining activity is set to start toward the end of next year. And if it's successful, it could be the beginning of a whole new industry, operating far from public view and, so far, with very little in the way of international rules and regulations.

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