A Rockland filmmaker needs your help identifying the people he interviewed on 9/11 for a documentary on the impact of the attacks and the resilience of New Yorkers.

Producer Patrick Heaphy was working in Manhattan on Sept. 11, 2001. When the first plane hit the World Trade Center, he grabbed his video camera and started walking down Fifth Avenue.

"I had questions just like everybody else, I think the difference with me was that I was rolling," says Heaphy.

Heaphy spoke to and asked questions of dozens of people on the street as they watched the tragedy unfold.

Now, Heaphy is turning his four hours of footage into a documentary, "9/11 + 20."

"With the 20th anniversary coming around, we were like, we could try to find all of the people and see where they are now. What was this day like for them?" says Heaphy.

Heaphy and his production team in Pearl River have identified a handful of people so far using social media and context clues. They tracked down one woman in New Jersey based on the logo on the T-shirt she was wearing.

The team has posted photos and videos online in hopes of being able to ask some of them how 9/11 changed their life.