Nineteen-year-old Bosnian Serb Gavrilo Princip fired the shots that killed the heir to the Austro-Hungarian empire, Archduke Franz Ferdinand, and his wife, Sophie, during a visit to Sarajevo on June 28, 1914. Depending on whom you ask, he's either a hero or a terrorist. Historical Archives Sarajevo/AP hide caption

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A doctor vaccinates a child against polio at a health clinic in Damascus, Syria, on Nov. 6. To stop the disease from spreading beyond Syria, health officials plan to vaccinate 20 million children in the region. Youssef Badawi/EPA /LANDOV hide caption

itoggle caption Youssef Badawi/EPA /LANDOV

Mario Draghi, president of the European Central Bank. Some say he's super. Daniel Reinhardt /DPA/LANDOV hide caption

itoggle caption Daniel Reinhardt /DPA/LANDOV

Ava Gene's, a Roman-inspired restaurant in Portland, Ore., incorporates colatura, a modern descendant of ancient Roman fish sauce, into several of its dishes. Deena Prichep/NPR hide caption

itoggle caption Deena Prichep/NPR

A woman holds up a picture of a 5-year-old girl who disappeared in May in Clermont-Ferrand, in central France. As estimated 250,00 kids go missing each year in Europe, according to the European Union. Many are runaways that are later found, though there are also cases involving small children who are abducted. Thierry Zoccolan/AFP/Getty Images hide caption

itoggle caption Thierry Zoccolan/AFP/Getty Images

Massive government surveillance of Americans' phone and Internet activity is drawing protests from civil liberties groups, but major legal obstacles stand in the way of any full-blown court hearing on the practice. Among them: government claims that national security secrets will be revealed if the cases are allowed to proceed. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

Migrants arrive in Valletta, the Maltese capital, aboard a patrol boat on Oct. 12, a day after their boat sank, killing more than 30 people, mostly women and children — just the latest deadly migrant tragedy to hit the Mediterranean. Despite Europe's financial crisis illegal immigrants continue to attempt to enter Europe through its southern coastal countries as they seek a better life. AFP/Getty Images hide caption

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The line outside an employment office in Madrid last October. Spain's economy has been among the hardest hit in Europe. Dominique Faget /AFP/Getty Images hide caption

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Cards depicting the 'royal baby' either as a boy or a girl, specially made by a games company as a publicity stunt are pictured, backdropped by members of the media waiting across the St. Mary's Hospital exclusive Lindo Wing in London on July 11, 2013. Lefteris Pitarakis/AP hide caption

itoggle caption Lefteris Pitarakis/AP

An anti-government protester wearing a gas mask uses a cellphone to read the news on social media as demonstrators gather at midnight in Istanbul's Taksim Gezi Park on June 13. Ozan Kose/AFP/Getty Images hide caption

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Protesters demonstrate in Berlin on Tuesday on the eve of President Obama's visit to the German capital. Obama is expected to encounter a more skeptical Germany in talks on trade and secret surveillance practices. Odd Andersen /AFP/Getty Images hide caption

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Spain's King Juan Carlos, his daughter Infanta Cristina and her husband, Inaki Urdangarin, are seen together on May 22, 2006. A corruption scandal involving Urdangarin, as well as the royal family's lifestyle is contributing to the public's diminishing respect for the monarchy. Jasper Juinen/AP hide caption

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The Spanish city of Santander is using a network of sensors to help improve services and save money. Incidents reported to Santander's command-and-control center, where the city manages data from sensors and smartphone reports made by citizens, are plotted on a map of the city. Courtesy of the University of Cantabria hide caption

itoggle caption Courtesy of the University of Cantabria

People queue to use an ATM outside of a Laiki Bank branch in Larnaca, Cyprus, on Saturday. Many rushed to cooperative banks after learning that the terms of a bailout deal with international lenders includes a one-time levy on bank deposits. Petros Karadjias/AP hide caption

itoggle caption Petros Karadjias/AP