Twenty-five years after September 11, 2001, this clip from the documentary "9/11 + 25: Return to Ground Zero" offers a look at America’s darkest day through raw footage and firsthand witness accounts captured in real time. Filmed walking down Fifth Avenue as the tragedy unfolded at the World Trade Center, documentary filmmaker Patrick Heaphy documents the immediate confusion, fear, and reactions of New Yorkers as they experience the attacks. Watch "9/11 + 25: Return to Ground Zero" on THIRTEEN or stream on thirteen.org and PBS platforms. #911 #worldtradecenter #nyc #history #september11th #shorts #newyork #news #twintowers