Super sniffers: from sniffing out bombs to detecting cancer, dogs are working to save people's lives

"The dogs begin training when they're 2 months old. They live with foster families that drop them off at the center from 9 a.m. to 5 p.m. every weekday, just like kids going to school. Trainers play hide-and-seek with the puppies to fine-tune their sense of smell. ... We give all of our dogs a general education, and eventually they get to 'pick a major," bombs, blood, disease, etc.