A former police officer who retired from the FBI due to post-traumatic stress disorder linked to her role in the aftermath of the Sept. 11 terror attacks has written a book about seeing legions of angels guarding the Pennsylvania site where a hijacked airliner crashed.

Lillie Leonardi served as a liaison between law enforcement and the families of the passengers and crew members killed in the United Airlines Flight 93 crash. She arrived on the scene about three hours after the crash.

Although Leonardi’s book, “In the Shadow of a Badge: A Spiritual Memoir,” centers on her vision of angels, she argues her life has been changed more by what she didn’t see that day.

“The biggest thing for me is that that there were no bodies,” she said.