Elizabeth Warren speaks in October during a debate for the U.S. Senate seat in Massachusetts held by Republican Scott Brown. The race has become a contest of who is the "real" populist. Elise Amendola/AP hide caption

Air travel contributes only 2 to 4 percent of carbon dioxide emissions worldwide. A new ruling says airlines flying into and out of European airports will have to pay a price for the carbon dioxide they emit from burning jet fuel. Above, a plane takes off from the Geneva airport last year. Fabrice Coffrini/AFP/Getty Images hide caption

The young journalist Tintin (Jamie Bell, left) and the permanently drunk Captain Haddock (Andy Serkis) go on a global treasure chase in The Adventures of Tintin: Secret of the Unicorn. WETA Digital Ltd. hide caption

Iranian President Mahmoud Ahmadinejad regularly defends his country's nuclear program despite international criticism. The president is shown here on a visit to Varamin, south of Tehran, on Wednesday. Atta Kenare/AFP/Getty Images hide caption

Glenn Close portrays a woman quietly living as a man in 19th-century Ireland. The character, Albert Nobbs, worked and saved money to avoid the wave of poverty plaguing the country at the time. Patrick Redmond hide caption

Park Sang-nak, a North Korean defector, displays anti-North Korea leaflets before sending them by balloon into North Korea, at Imjinggak peace park in South Korea near the Demilitarized Zone dividing the two Koreas on Wednesday. Defectors from the North are hoping the death of North Korean leader Kim Jong Il may provide an opportunity for political change. Yang Hoi-Sung/AFP/Getty Images hide caption

The flower auction house in Aalsmeer, the Netherlands, is one of the largest in the world — and a part of the country's strong export base. As Europe's debt crisis continues, the Dutch economy is feeling the effects of being heavily reliant on world trade. Pan Zhi/Xinhua /Landov hide caption

Greek demonstrators protest in Athens on Nov. 8. Similar economic crises in Argentina and Uruguay a decade ago may be instructive for Greece today. Orestis Panagiotou/EPA /Landov hide caption

John Oates (left) and Daryl Hall (right) of pop duo Hall & Oates, seen here in 1987. These days, they're available on your phone. Dave Hogan/Hulton Archive/Getty Images hide caption