we do it by good breeding. >> reporter: the tsa puppy program was launched after 9/11. every puppy is named after a victim of the terrorist attack. these two are the last names of a port authority manager and fbi agent both killed at the world trade center. their special names are tattooed inside their ear. it's also a gesture that touches the relatives. lisa met the puppy named for her husband that was killed inside the pentagon. >> it seems like this puppy has completed a circle for my family. >> reporter: scott manages the program in san antonio. >> as soon as they are born, we expose them to the different odors they are going to be looking for. >> reporter: formal training doesn't begin until they are a year old. they make promising recruitinre. >> a dog that likes it -- >> reporter: puppies that make the cut go on in a bomb career. train stations and passenger planes. >> i think they are an invaluable part of the detection we have. >> reporter: 500 puppies have been bred for this program. half of them are working in the field. others are making more puppies. at the