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394263 03: (PUERTO RICO OUT) A paramedic and a policemen breath oxygen after the first tower of the the Twin Towers crumbled down after two planes hit the World Trade Center September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

394263 03: (PUERTO RICO OUT) A paramedic and a policemen breath oxygen after the first tower of the the Twin Towers crumbled down after two planes hit the World Trade Center September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)