The bottom line is how do we best provide for the security of the traveling public in light of a determined enemy who is adept at constructing well-designed well-concealed devices which would not show up in a walk-through metal detector? We're trying to employ the best technology to identify any possible threat.
In my world history comes down to language and art. No one cares much about what battles were fought who won them and who lost them - unless there is a painting a play a song or a poem that speaks of the event.
