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Drug-resistant tuberculosis is on the rise worldwide, but identifying the disease has been difficult and time-consuming. Touted as a "game changer" in the fight against TB, a new tool cuts diagnostic times from weeks to hours and doesn't require a lab.

The proposed rules would limit snacks to a maximum of 200 calories and promote options like fruits, vegetables and whole grains. Experts say this many fewer calories each day, over years, can add up to big calorie savings.

Sen. Marco Rubio, R-Fla., appears to have reversed his views on an earned path to citizenship, which in a Tea Party-backed 2010 campaign he called "code for amnesty." Some critics say the young Cuban-American lawmaker seems to be looking ahead to 2016 and a possible White House bid.

Weekend Edition Saturday host Scott Simon remembers former New York Mayor Ed Koch. He died on Friday at the age of 88.

In Cairo you can get just about anything delivered at almost any hour of the night. Have the flu? You can order vitamin C and meds from the pharmacy at 2 a.m. One deliveryman has been dodging tear gas and clashes to get Lebanese takeout to people's doors.

It's a tradition that goes back to 1887, and while he's not always correct, the Punxsutawney, Pa., groundhog has a massive following who watch his every move on Groundhog Day.

The U.S. Geological Survey reports the tremor's magnitude was 6.9 and was centered very deep in the earth.

On the eve of Super Bowl Sunday, host Laura Sullivan speaks with former NFL lineman Tre Johnson and writer Tom Junod, whose piece in this month's Esquire takes readers into the training room, where players recover from their many injuries. And in many ways, those injuries last a lifetime.

Chen Guangbiao is trying to call attention to China's environmental issues by selling clean air. Eighty cents buys you a touch of air from "pristine Tibet."

In the 1990s, Jim McCormick was teaching at the University of New Orleans and looking ahead to a future in academia. Today, he's one of the hottest lyricists in country music, having hit the top of the Billboard Country Music charts twice in the past six months.