Dogs have long been used to sniff out drugs and bugs and even bombs! But can these furry friends also identify the smell of cancer? A special program in San Antonio has been designed to help protect some of our most vulnerable heroes, firefighters. "Everything a firefighter does is a calculated risk," San Antonio firefighter Joe Arrington said. And firefighters may be at risk for cancer since those who work the Hazmat team and other dangerous assignments are exposed to hazardous chemicals every single day.. A joint effort between the San Antonio Fire Department and the Firefighter's Association has launched a program to find out using these special test kit masks. "I found out about this program last summer. I was up in Illinois doing a firefighting study," Safety Division Executive Officer Jennifer Chadwick said.