Oliver Stone's movie and how the 9/11 rescue really happened

This article about Oliver Stone's 9/11 movie tells an interesting story that didn't make it into the movie. Recovery is everywhere:

Whatever the filmmakers' reasons, they missed one of the more remarkable aspects of this rescue story. Chuck Sereika, a man with no training in collapsed-building rescue and extrication, risked his life that day for men he had never met. Sereika said he was sure he would die when he crawled in. Unlike the police and firefighters who without hesitation sacrificed everything—and I in no way discount their selfless acts—Sereika was not called to duty by his unit. He arrived on his own accord. He was a paramedic, but his license had expired and he had left that life behind as he sought treatment for addiction problems. But he grabbed his medic sweatshirt and his cell phone and headed down to Ground Zero to see if he could apply a few splints or perform minor triage. He never imagined that he would be involved in one of the few and most memorable rescues of Sept. 11.