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Associated Press
In this June 13, 2012 photo, Javier E. Matos, left, repairs a phone at The Cell Phone Clinic, a private business in Havana. For decades, Communist-run Cuba has essentially been free of commercial advertising. But it's a knotty problem for thousands of budding entrepreneurs who have embraced President Raul Castro's push for limited free-market reform. So they're turning to guerrilla marketing. (AP Photo/Franklin Reyes)

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