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Here's good news for geezers — or for merely middle-aged folks — who'd like to stay fit and independent far into their later years.

You don't have to lift heavy weights to build muscle strength. Lifting lighter weights can be just as effective if you do it right, and you're much less likely to hurt yourself, researchers say.

An Associated Press investigation has concluded that the U.S. military and its allies in Afghanistan have been "under-reporting the number of times that Afghan soldiers and police open fire on American and other foreign troops."

According to the wire service:

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In a bid to encourage its members to become organ donors, Facebook just announced that "starting today, you can add that you're an organ donor to your timeline, and share your story about when, where or why you decided to become a donor."

Also, Facebook CEO Mark Zuckerberg and COO Sheryl Sandberg write, "if you're not already registered with your state or national registry and want to be, you'll find a link to the official donor registry there as well."

Media mogul Rupert Murdoch is "not a fit person" to lead a major international company, a committee of U.K. parliament members concludes today in a scathing report about the News Corp. chief and the actions of his British tabloids, NPR's Philip Reeves tells our Newscast Desk.

The report also accuses Murdoch's companies of "misleading a parliamentary committee," Philip says, and exhibiting "willful blindness" regarding their illegal activities.

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The president's counterterrorism chief, John Brennan, made another statement yesterday. He argued that drone strikes to kill militants are legal.

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Brennan's remarks were unusual. It's rare that the administration mentions drones at all. Yesterday, Brennan chose to say that the missile strikes by unmanned aircraft which take place in countries like Yemen and Pakistan fit within international law.

Republican Sen. Kelly Ayotte of New Hampshire is the latest politician to appear on the campaign trail with presumed Republican presidential nominee Mitt Romney. That's fueled speculation that Ayotte is being considered as a running mate.

Wal-Mart remains under a cloud after The New York Times reported the retailers expansion in Mexico involved systematic bribes. To get a sense of how that might play out, Steve Inskeep talks to Peter Solmssen, a managing board member and general counsel for Siemens. The German engineering and electronics conglomerate was involved in its own bribery scandal.

South Sudan is the country that voted to break away from Sudan. They've been jostling for control of border zones, including oil fields. And just as the two sides were sitting down to negotiate, fighting broke out.