WATCH LIVE: New York City holds 9/11 remembrance ceremony

Flags bearing the names of victims of the 9/11 attacks stand in Memorial Park in Omaha, Neb., Thursday, Sept. 10, 2015, one day before the anniversary of the attacks. (AP Photo/Nati Harnik)

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911 Memorial Museumterrorismosama bin ladenworld trade centerattacku.s. & worldseptember 11september 11thseptember11New York
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