9/11 20 Years Later: Billy Denis Retired From The FDNY Days Before 9/11; The Attacks Brought Him Back To The Job
Billy Denis retired from the FDNY just five days before 9/11. After the twin towers came down, he rushed to ground zero and stayed through the darkest days of the recovery efforts. Twenty years later, he tells CBS News: "I couldn't live with myself if I didn't do it."
