In this March 18, 2015, photo, Carla Cristina, 26, poses for a portrait next to her water stand in an open-air crack cocaine market, known as a “cracolandia” or crackland, where users can buy crack, and smoke it in plain sight, day or night, in Rio de Janeiro, Brazil. Carla Cristina sells cups of water with an aluminum seal, which users will transform into makeshift pipes for smoking their crack. (Photo by Felipe Dana/AP Photo)
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