There is new line of defense against the forces of evil, and it could save countless lives. A "vapor wake dog" is specially-trained to detect explosives when they are in motion, making the task of defending public places like an airport, parks and train terminals safer for travelers. The dogs can home in on the scent of an explosive device and follow the vapor. They hold an advantage over traditional bomb-sniffing dogs, which can only detect bombs that are right up close and stationary. #InsideEdition