A significant number of lives were lost on September 11, 2001, including many first responders. Firefighters and police officers were among the victims.

A team from the San Francisco Fire Department traveled to New York to assist after the disaster. Chief Dean Crispen, who was part of the response, has spoken about the experience and its impact on his career.

Further information about his reflections and the lessons learned from that day can be found through an interview with him.