A bird flies in front of the Eiffel Tower ,which remained closed on the first of three days of national mourning, in Paris, Sunday, Nov. 15, 2015. Thousands of French troops deployed around Paris on Sunday and tourist sites stood shuttered in one of the most visited cities on Earth while investigators questioned the relatives of a suspected suicide bomber involved in the country's deadliest violence since World War II.(AP Photo/Daniel Ochoa de Olza)

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