South Korean President Lee Myung-bak (shown here as a young accountant, working for Hyundai's office in Thailand in the early 1960s) overcame a poverty-stricken childhood to become a student activist, successful business executive and, ultimately, leader of his country. Courtesy of Lee Myung-bak hide caption

Mark Kelly has a new book about his wife, Rep. Gabby Giffords, and her road to recovery since she was shot in the head on Jan. 8. Courtesy of P.K. Weis hide caption

Public health officials say the evidence is solid that fluoridated drinking water helps protect teeth. Jim Cole/AP hide caption

Pizza for sale at a Chicago public school. Under a House spending bill, this would still count as a vegetable serving — without extra sauce. Tim Boyle/Getty Images hide caption

Former House Speaker Newt Gingrich, shown in May speaking at the Georgia Republican Party Victory Dinner in Macon, Ga., says he was acting as a "historian" when Freddie Mac paid him consultant fees of $300,000. Jessica McGowan/Getty Images hide caption

Demonstrators from a Salafi group chant slogans and hold posters that read, in Arabic, "Islamic Egypt," during a Sept. 23 protest against emergency law in Cairo. Salafi political parties will be among those vying in upcoming elections. Khalil Hamra/AP hide caption

A New York City Taxi & Limousine Commission medallion adorns the hood of a taxi. The value of a medallion has increased 1,000 percent since 1980. Chip East/Bloomberg via Getty Images hide caption

Queen Elizabeth I's coronation portrait Wikimedia hide caption