From RETRO REPORT.

Seconds after the World Trade Center towers were attacked on Sept. 11, 2001, by terrorists flying two hijacked planes, New York City mounted the largest rescue effort in its history. More than 2,000 emergency responders were dispatched to lower Manhattan. Those who survived don’t want that day to be forgotten. Visit our website to hear their stories in our video, "9/11 Heroes: Surviving the Biggest Attack on U.S. Soil." Teachers, browse our full "Teaching About 9/11" Collection today. #september11 #newyork #firstresponders #worldtradecenter #politics #ushistory #newyork