Bomb sniffing dogs play increasing role in war

Considering dogs have played been active in the United States military since before the Civil War, I found this story interesting. The Marines, who use the dogs to help sniff out bombs, have become so valuable they are increasing the number of dogs being trained to be sent overseas.
Unfortunately, during Vietnam many service dogs were killed after the warand not allowed to be returned to civilian life. this doesn't seem to be the case with these military dogs.