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Alexis Tsipras, Greece's prime minister, speaks during a live interview at Sto Kokkino radio station in Athens, Greece, on Wednesday, July 29, 2015. "The Greek people were prisoners, who after they escaped prison were immediately arrested and returned to an even smaller cell," Tsipras, who turned 41 on Tuesday, told an Athens radio station. Photographer: Kostas Tsironis/Bloomberg via Getty Images

Alexis Tsipras, Greece's prime minister, speaks during a live interview at Sto Kokkino radio station in Athens, Greece, on Wednesday, July 29, 2015. "The Greek people were prisoners, who after they escaped prison were immediately arrested and returned to an even smaller cell," Tsipras, who turned 41 on Tuesday, told an Athens radio station. Photographer: Kostas Tsironis/Bloomberg via Getty Images