Dennis Smith developed a profound respect for the professionalism of the firefighters, police officers, EMTs, and nurses during his 18 years as a New York City firefighter. His engine company responded to more than 40 alarms every day, witnessing the willingness of these professionals to give of themselves in the line of duty.

His experiences in the fire service have been immortalized in his books, most notably "Report from Engine Co. 82," which became an immediate New York Times bestseller, sold 3 million copies, and was translated into 13 languages.

In 2001, Dennis responded to the attack on the World Trade Center, arriving just as the second building fell. He stayed for 57 consecutive days, first in rescue work and then in recovery operations.