I know I have mentioned this in previous threads but it's worth saying again for those that are interested. A hard cover book titled "the Sky Is Falling" authored by Arthur Weingarten was published in 1977 and is all about the crash. From the crew onboard right up to and after the crash it's a book you cannot put down. Numerous photos of the crew and FDNY operations at the site. I'm sure copies are still available if you check on line. Enjoy!