Tony Stefani, a San Francisco native and retired Fire Department captain, founded the San Francisco Firefighters Cancer Prevention Foundation in 2006 after surviving his own battle with the disease. The 60-year-old shares his thoughts on the 10th anniversary of 9/11 and his mission of reducing firefighter exposure to cancer-causing toxins.How big is the concern of firefighters being exposed to toxins before and after combating a blaze? Read More