Scotland's offshore oil platforms in the North Sea generate significant wealth for the nation — especially for the Shetland Islands, where oil tanker traffic boosts the local economy. Andy Buchanan - WPA Pool/Getty Images hide caption

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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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Dr. James Logan, an entomologist, studies mosquitoes from around the world in an effort to make them less dangerous. The London School of Hygiene and Tropical Medicine keeps them in a cavern beneath the streets of London. The bowls contain mosquito larvae in water, while the boxes are where the adults live. Ari Shapiro/NPR hide caption

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On a glorious but rare day, a woman relaxes on a bench in the rose garden in Hyde Park on Monday in London, England. The book she's reading might have turned out much different if London were known for fair weather rather than fog. Dan Kitwood/Getty Images hide caption

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A taxi precedes demonstrators during a protest against Uber in Barcelona on Wednesday. A conventional taxi license in Spain can cost 137,000 euros ($185,400), making competition from services like Uber a major financial issue. Josep Lago/AFP/Getty Images hide caption

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Actress Angelina Jolie and British Foreign Secretary William Hague brought together representatives from more than 100 countries for the London conference on sexual violence in conflicts. Peter Macdiarmid/Getty Images hide caption

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Prince Charles talks to Lynn Forester de Rothschild (left), organizer of the Conference on Inclusive Capitalism, and Christine Lagarde, head of the International Monetary Fund, before Tuesday's conference. The 250 corporate and financial leaders who attended control some $30 trillion, about a third of the world's investable assets. WPA Pool/Getty Images hide caption

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A Ukrainian nationalist carries a portrait of Stepan Bandera, founder of a Ukrainian rebel army that fought the Soviet Union in the 1930s and '40s. The rally was held on Jan. 1, 2013. While many Ukrainians see Bandera as a hero, many Russians view him as an ally of Hitler and a mass murderer. Efrem Lukatsky/AP hide caption

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The mask of this Kiev protester (at a 2012 demonstration demanding more funding for HIV treatment) reads "quarantine." There are enough drugs to treat only half the HIV patients in Ukraine. Sergei Supinsky/AFP/Getty Images hide caption

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The leader of Britain's opposition Labour Party, Ed Miliband, speaks to supporters earlier this month in London. His party and the ruling Conservative Party have both hired former advisers to President Obama in advance of Britain's national election next year. Peter Macdiarmid/Getty Images hide caption

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