Advisory: The following program contains material which may be disturbing to some viewers. Discretion is advised. 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 (@LCM247) documents the immediate confusion, fear, and reactions of New Yorkers as they experience the attacks. Watch "9/11 + 25: Return to Ground Zero" Monday, September 7 at 10 p.m. on THIRTEEN or stream on thirteen.org and PBS platforms. Discover the stories that built New York City from a Dutch trading post into an iconic global powerhouse. The WNET Group explores defining events—from architectural triumphs and the arrival of the Statue of Liberty to the solemn 25th anniversary of 9/11—uncovering local history through rich archi...