A U.S. Army soldier guards the remains of a burned-out military ammunition truck after it was attacked in Fallujah, Iraq, on Oct. 19, 2003. Fallujah and its surrounds were the site of some of the bloodiest fighting for U.S. troops during the Iraq war. Khalid Mohammed/AP hide caption

Tobacco companies incorporated doctors in their ads, such as this 1930 Lucky Strike campaign, to convince the public that smoking wasn't harmful. Stanford University hide caption

Qiu Xiaolong in his ancestral house during a visit from his home in St. Louis. Frank Langfitt/NPR hide caption

A poster advertises a stage adaptation of Sherlock Holmes, starring actor William Gillette in 1899. Library of Congress hide caption

The Navigate Jacket from Wearable Experiments uses GPS navigation and a mapping app on the wearer's smartphone to signal directions. It's part of a new trend of wearable tech that some speculate will be a billion-dollar industry. Rupert Kaldor /Wearable Experiments hide caption

Peter Gabriel's 2010 covers album Scratch My Back is complemented this year by a multi-artist tribute album, And I'll Scratch Yours. Michele Turriani/Courtesy of the artist hide caption

Katherine Hackett of Connecticut introduces President Barack Obama during a White House event on unemployment insurance Jan. 7. Hackett spoke about her financial struggles during unemployment before Obama put pressure on the House to extend benefits. Alex Wong/Getty Images hide caption

Sadie Bjornsen in the 2013 Nordic World Championships at Val di Fiemme, Italy. She is on the U.S. Olympic team. Sarah Brunson/U.S. Ski Team hide caption