So here we are in the year 2008, we have laptops as thin as a potato chip, cars that run on electricity or hydrogen and 400 channels of satellite TV beamed right to your living room…yet the best way we have to detect explosives in many environments is that 4-legged friend, the dog.

That’s right, TSA uses all kinds of tools to ensure the safety of passengers; things like minivan-sized explosive detection systems How We Do What We Do: Baggage...