Zurich Zurich

Ambulance and police cars outside an Islamic center in central Zurich on Monday after three people were injured by gunfire. Police say the gunman later killed himself. Michael Buholzer/AFP/Getty Images hide caption

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Michael Buholzer/AFP/Getty Images

Photos of Luanda, Angola, tell a tale of two cities: sprawling poor neighborhoods and a glitzy waterfront. Saul Loeb/Getty Images; Michael Gottschalk/Getty Images hide caption

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Saul Loeb/Getty Images; Michael Gottschalk/Getty Images