Milos Karadaglich says as soon as he held his father's rusty, old guitar, he knew it was the instrument he would play. Olaf Heine hide caption

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Dubai now boasts the world's largest building, Burj Khalifa. Zakaria says the world is now experiencing what he calls "the rise of the rest," where countries around the world are growing at previously unthinkable rates. Marwan Naamani/Getty Images hide caption

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Research from Stanford University showed that while Philadelphia had a slightly higher percentage of charter schools outperforming traditional public schools, the city also had many more charter schools — more than half, in some categories — where the students weren't performing as well as they did at their previous school. hide caption

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A creation of Christoph Niemann's. Christoph Neimann/Greenwillow Books hide caption

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Sugar Ray Leonard is a 1976 Olympic gold medalist. Deborah Wald hide caption

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