New British Prime Minister Theresa May announced six members of her Cabinet Wednesday.

Amid a sweeping crackdown on dissent in Egypt, security forces have forcibly disappeared hundreds of people since the beginning of 2015, according to a new report from Amnesty International.

It's an "unprecedented spike," the group says, with an average of three or four people disappeared every day.

The Republican Party, as it prepares for its convention next week has checked off item No. 1 on its housekeeping list — drafting a party platform. The document reflects the conservative views of its authors, many of whom are party activists. So don't look for any concessions to changing views among the broader public on key social issues.

Many public figures who took to Twitter and Facebook following the murder of five police officers in Dallas have faced public blowback and, in some cases, found their employers less than forgiving about inflammatory and sometimes hateful online comments.

As Venezuela unravels — with shortages of food and medicine, as well as runaway inflation — President Nicolas Maduro is increasingly unpopular. But he's still holding onto power.

"The truth in Venezuela is there is real hunger. We are hungry," says a man who has invited me into his house in the northwestern city of Maracaibo, but doesn't want his name used for fear of reprisals by the government.

The wiry man paces angrily as he speaks. It wasn't always this way, he says, showing how loose his pants are now.

Ask a typical teenage girl about the latest slang and girl crushes and you might get answers like "spilling the tea" and Taylor Swift. But at the Girl Up Leadership Summit in Washington, D.C., the answers were "intersectional feminism" — the idea that there's no one-size-fits-all definition of feminism — and U.N. climate chief Christiana Figueres.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

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Tornado Tech: How Drones Can Help With Twister Science

Aug 16, 2013
Originally published on May 12, 2014 11:15 am

Oklahoma was hit particularly hard by two massive outbreaks this year in what's been another deadly season of tornadoes in the U.S. Despite technology and forecasting improvements, scientists still have plenty to learn about how and why tornadoes form.

Currently, one of the best ways for researchers to understand how tornadoes form is to chase them. So off they go with mobile science laboratories, rushing toward storms armed with research equipment and weather-sensing probes.

It's dangerous work. Three chasers died in one of Oklahoma's May tornadoes because the storm unexpectedly changed directions. And there's also a lot left to chance — only 20 percent of supercell thunderstorms produce tornadoes.

"It's a loaded gun," says Jamey Jacob, an aerospace engineering professor at Oklahoma State University, of the big weather systems. "It's ready to go off, but when and where does it fire?"

One of the downsides of the current tornado research method is that it's passive, Jacob says. "You throw [probes] out there, [and] you hope something gets caught up [in the storm] somewhere," he says.

So he and dozens of other scientists and engineers are remaking tornado technology. They're looking to small drone aircraft loaded with sensors that can be launched from the trunk of a car, far from a potential tornado.

"With unmanned aircraft," Jacob says, "you fly it where you want it to go."

If you open up these drones, the contents could have come from a middle school science project. But the Kevlar shell and the tiny sensors are fit for a high-tech military plane.

Brian Argrow directs the research and engineering center for unmanned aerial vehicles at the University of Colorado, Boulder.

"Being able to sample the pressure, temperature, humidity, wind velocity — that you can't do remotely," he says. "Radar can only do so much at this point."

Scientists think these drones can help them increase warning time from the current 14-minute average to as much as an hour. Argrow says the technology exists, and the planes are ready to go, but many of them are stuck in university laboratories, frustrating researchers.

"It's often that technology gets ahead of policy, particularly in this country, and this is an instance where that essentially has happened," he says. "Some of the technology — the capability, anyway — has gotten ahead of what the current air traffic system is able to accommodate directly."

The Federal Aviation Administration declined to be interviewed for this story, but Argrow and his team started working with the agency in 2009 to integrate the new storm-chasing technology into the nation's airspace. They were able to fly into a few storms back then. But it's a very slow, bureaucratic process that doesn't mesh well with fast-developing thunderstorms.

Scientists think if new policies are put in place, these aerial chasers could be widely operational in five years, allowing meteorologists to make more accurate tornado warnings.

Copyright 2014 KOSU-FM. To see more, visit http://www.kosu.org.

Transcript

DAVID GREENE, HOST:

When that monster tornado hit Moore back in May, residents had been warned in advance. But despite all the technology and improvements in forecasting, scientists still have plenty to learn about how and why tornadoes form.

Rachel Hubbard of member station KOSU reports on idea: using drones.

RACHEL HUBBARD, BYLINE: Here's what happens when the National Weather Service issues a tornado watch, which means a tornado could form in a certain area: a small army of tornado chasers descends to follow the potentially deadly storm.

UNIDENTIFIED MAN: Let's go. You have to get around him, man. Move. Get down. Duck down.

(SOUNDBITE OF WIND AND HELICOPTER)

HUBBARD: Amid all the news crews and curious onlookers are scientists. Right now, the best way for them to understand how tornadoes form is to chase them. So, off they go with mobile science laboratories. Think the movie "Twister," where they pursue the storms with a giant canister of sensors in the back of a truck.

(SOUNDBITE OF MOVIE, "TWISTER")

HELEN HUNT: (as Jo Harding) If it drops anywhere near us...

BILL PAXTON: (as Bill Harding) It's not going to drop anywhere near us. It's going to drop right on us.

HUBBARD: It's dangerous work. Three chasers died in one of Oklahoma's May tornadoes because the storm unexpectedly changed directions. On top of that, there's a lot of chance. Only 20 percent of supercell thunderstorms produce tornadoes.

JAMEY JACOBS: It's a loaded gun. It's ready to go off. But when and where does it fire?

HUBBARD: That's Jamey Jacobs, an aerospace engineering professor at Oklahoma State University.

JACOBS: The downside to that is it's all passive. You throw it out there, and you hope something gets caught up somewhere. With unmanned aircraft, you fly it where you want it to go.

HUBBARD: He and dozens of other scientists and engineers are remaking tornado technology, which can be launched from the trunk of a car, far from a potential tornado.

(SOUNDBITE OF DRONE ENGINE)

HUBBARD: It's an unmanned aerial vehicle that looks like an overgrown model airplane. If you open a drone, the contents could have come from a middle school science project, complete with dowel rods and glue.

But the Kevlar shell and the tiny sensors are fit for a high-tech military plane. Brian Argrow directs the research and engineering center for unmanned aerial vehicles at the University of Colorado at Boulder.

BRIAN ARGROW: Being able to sample the pressure, temperature, humidity, wind velocity that you can't do remotely, so you can't get a - radar can only do so much remotely at this point.

HUBBARD: Scientists think these drones can help them increase warning time from the current 14-minute average, to as much as an hour. Argrow says the technology exists and the planes are ready to go, but many of them are stuck in university laboratories, frustrating researchers.

ARGROW: It's often that technology gets ahead of policy, particularly in this country, and this is an instance where that essentially has happened. Some of the technology - the capability, anyway - has gotten ahead of what the current air traffic system is able to accommodate directly.

HUBBARD: The FAA declined to be interviewed for this story, but Argrow and his team started working with the agency in 2009 to integrate the new storm-chasing technology into the nation's airspace. They were able to fly into a few storms then. But it's a very slow, bureaucratic process that doesn't mesh well with fast-developing thunderstorms.

Scientists think if new policies are put in place, these aerial chasers could be widely operational in five years, allowing meteorologists to make more accurate tornado warnings. For NPR News, I'm Rachel Hubbard, in Oklahoma City. Transcript provided by NPR, Copyright NPR.