Morning Edition

Everybody itches. Sometimes itch serves as a useful warning signal — there's a bug on your back! But sometimes itch arises for no apparent reason, and can be a torment.

Think of the itchy skin disorder eczema, or the constant itching caused by some cancers. "A very high percentage of people who're on dialysis for chronic kidney disease develop severe itch that's very difficult to manage," says Dr. Ethan Lerner, an associate professor of dermatology at Harvard Medical School.

Scientists now say they've got a much better clue as to how itch happens.

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RENEE MONTAGNE, HOST:

Good morning. I'm Renee Montagne. Five years ago, at the age of 75, a Japanese mountaineer raced a 76-year-old Nepalese climber to the top of Mount Everest. Japan's Yuichiro Miura lost. This morning, in an epic rematch, the now 80-year-old Miura won, becoming the oldest person ever to reach the summit. But that record may not last. Next week, his Nepalese rival, at 81, plans to make the ascent again. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.

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DAVID GREENE, HOST:

Good morning, I'm David Greene with a story of mistaken identity - at the bar. New Jersey officials have wrapped up an operation called Operation Swill that target bars who are trying to pull a fast one. They'll charge for good booze but actually pour the cheap stuff in your glass. They've caught 29 bars red-faced; 13 of those TGI Fridays. The operation involved confidential informants, gizmos to test out liquor, and more than 100 agents. I would say this was some top shelf police work.

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RENEE MONTAGNE, HOST:

This is MORNING EDITION, from NPR News. Good morning. I'm Renee Montagne.

DAVID GREENE, HOST:

And I'm David Greene.

For months now, the Obama administration has promised to reveal more about America's secret drone program, and today could be the day. The president will speak this afternoon at the National Defense University, and he's planning to discuss America's fight against terrorism. He is expected to address everything from drones to the prison at Guantanamo Bay.

NPR's Dina Temple-Raston has this preview.