A grandmother and her grandson sit on the belongings that they have salvaged from their collapsed homes on April 29, 2015 in Bhaktapur, Nepal. Omar Havana/Getty Images hide caption

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As China continues its massive economic growth, especially in cities, the government continues to severely limit people's rights. Is that system sustainable? Johannes Eisele/AFP/Getty Images hide caption

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The city of Hollywood, Fla., bought the Homeless Voice shelter from its owner, a longtime advocate for the homeless who agreed to stay away from the city for the next 30 years. Greg Allen hide caption

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Chinese President Xi Jinping, center, and Asian leaders approved an agreement on the Asian Infrastructure Investment Bank in Beijing in Oct., 2014. European countries are beginning to sign up too. Takaki Yajima/AP hide caption

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President Barack Obama and first lady Michelle Obama unveiled the Let Girls Learn program at the East Room of the White House on Tuesday. Chip Somodevilla/Getty Images hide caption

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David Hermlin is a singer, dancer, musician and songwriter — oh, and a global activist, too. Sample lyric: "I will fight for my dream, and I will never give up." Courtesy of David Hermlin hide caption

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Random violence in Syria makes it a dangerous place for aid workers. This month, members of the Syrian Arab Red Crescent transported Syrians from a rebel area to a part of Aleppo controlled by the Assad regime. Baraa Al-Halabi/AFP/Getty Images hide caption

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They're members of the global-minded teens club: (left to right) Toluwanimi Sola-Adeyemi of Lagos, Chloe McGill of Seattle and Emine Arcasoy of Chapel Hill. Courtesy of Tolu Sola-Adeyemi, Chloe McGill and Emine Arcasoy. hide caption

itoggle caption Courtesy of Tolu Sola-Adeyemi, Chloe McGill and Emine Arcasoy.

School kids hold up a sign given to them by activists at a demonstration at Langata Primary Road School. Brian Inganga/AP hide caption

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John Mayer sings to tens of thousands at the 2013 Global Citizen Festival in Central Park. The event is part of an effort to end extreme poverty. Stephen Lovekin/Getty Images hide caption

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Haley Nordeen, 19, is spending the entire summer at the Prodesenh center in San Mateo Milpas Altas, Guatemala. The American University student helped build the center's new library. Carrie Kahn/NPR hide caption

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