Linton Weeks Linton Weeks joined NPR in the summer of 2008, as its national correspondent for Digital News.

President Obama has "often confounded his opponents by defying political stereotypes," says Julian Zelizer, a presidential historian at Princeton University. Saul Loeb/AFP/Getty Images hide caption

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Saul Loeb/AFP/Getty Images

The USS Barry launches a Tomahawk cruise missile Saturday in support of Operation Odyssey Dawn. The operation targeted radar and anti-aircraft sites along Libya's Mediterranean coast. U.S. Navy/Getty Images hide caption

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U.S. Navy/Getty Images

A fallout shelter sign graces the Madison County Courthouse in Huntsville, Ala., in 2007. The county is working on a plan to identify shelters that can house up to 300,000 people in the event of a nuclear incident. Dave Martin/AP hide caption

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Dave Martin/AP

A 1923 earthquake leveled much of Tokyo and Yokohama, Japan, killing more than 140,000 people. AP hide caption

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AP

A True Hero? President Obama presents the Medal of Honor to Staff Sgt. Salvatore Giunta in the East Room of the White House last November. Asked if he's a hero, Giunta said, "I am only mediocre. I'm average, and by no means did I do anything that anyone else wouldn't have done in that situation." Courtesy of the White House hide caption

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Courtesy of the White House

A VU Pioneer TX-9500 II. There are still people willing to drop a large chunk of their income on the best audio equipment available, says music professor Mark Katz. "That said," he adds, "the landscape — or perhaps soundscape — has changed." dogulove /via Flickr hide caption

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dogulove /via Flickr

'3-Weed Note' Artwork by Patterson Clark - alienweeds.com Courtesy of Patterson Clark hide caption

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Courtesy of Patterson Clark

Patt Clark on Asiatic Bittersweet

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Since Jan. 1, pump prices for gasoline have averaged well above $3 per gallon. Nati Harnik/AP hide caption

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Nati Harnik/AP

Hosni Mubarak gave a speech in which it was anticipated he would announce his resignation. Instead, the 82-year-old Egyptian president repeated his intention to remain in power until the presidential elections in September. AlJazeeraEnglish/YouTube hide caption

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AlJazeeraEnglish/YouTube

Spotted On The Runway: Let's hope these puppies from Jean-Paul Gaultier's Jan. 26 show in Paris don't catch on. Pascal Le Segretain/Getty Images hide caption

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Pascal Le Segretain/Getty Images