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Some experts recommend taking 10,000 steps a day for optimal health — a number that can be hard to get to on a busy day. Taking a work meeting to the sidewalk is one way to get more daily exercise. But how much walking do we really need?

The alleged mastermind of the Sept.11 attacks and four other defendants appeared in a military courtroom at Guantanamo Bay, Cuba, over the weekend. The hearing was supposed to be a straightforward arraignment, but nothing went according to plan.

Cash-strapped states are embracing the millions of dollars in new tax revenue coming from shale oil and gas development. But there aren't enough inspectors to make sure the sites aren't polluting. The problem seems especially apparent in Colorado, which now has more than 47,000 active oil and gas wells but the state employs just 17 inspectors.

In a bid to tamp down violence, the U.S. has been keeping diplomatic channels to the Taliban open in part by releasing some of its fighters if they pledge to put down their arms.

A new poll by a nonpartisan health organization suggests a majority of Kentuckians would support a statewide smoking ban. The Kentucky Health Issues Poll…

Chinese human rights activist Chen Guangcheng is in a Beijing hospital, hoping to eventually come to the U.S. to study. But what do Chinese-Americans think of him, and the diplomatic tension he sparked between the U.S. and China? Host Michel Martin discusses reactions with Sherry Zhang, host of a Mandarin-language call-in show in California.

Adam "MCA" Yauch, one of the group's founding members, died Friday after a lengthy battle with cancer. He was 47. Fresh Air remembers the raspy-voiced rapper with excerpts from a 2006 interview.

The super hero movie had a bigger opening weekend than the final Harry Potter film, which grossed $169.2 million.

Safety experts said the decline might, in part, have to do with Americans driving fewer miles and greater use of seat belts.

Warren Weinstein was kidnapped last August. Al-Qaida says he'll be released if the U.S. stops airstrikes in Pakistan and elsewhere. Weinstein says in a new video that he'll be killed if President Obama doesn't agree to the demands.