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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The Austro-Hungarian archduke and his wife, Sophie, board a car just prior to his assassination in 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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