Here's where it gets even weirder still… I just did some searching on Google, to find out more about the firefighters involved in the movie, and found this in a transcript of a Larry King interview with Dennis Quaid:

KING: I think there's a lot to be said for that. Before we meet Jim and we must ask, where you were on 9/11?

QUAID: I was here in L.A., just woke up and turned on the television.

KING: Were you working that day?

QUAID: No, I wasn't working that day. I had the day off. And I woke up and turned on the television just in time to see the first building fall. It's like I turned on the TV and it fell. And I didn't know what I was watching. But…

KING: Do you remember what you went through that day?

QUAID: Well, I just remembered I was thinking about the guys — because I did a movie called "Frequency" in New York where I played a firefighter and we used the Greg Jones firehouse.

KING: Oh, yeah?

QUAID: Yes. And I was thinking about those guys because I knew that they were close and they wound up losing 10 guys that morning, the guys that I'd been around and worked with.