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.
A number of scientists with greatly different backgrounds can come up with completely different assessments. The discussions or controversies are endless. Once a year we try to bring the most important discoverers together to exchange their experiences and knowledge.
They are ill discoverers that think there is no land when they can see nothing but sea.
At its best our age is an age of searchers and discoverers and at its worst an age that has domesticated despair and learned to live with it happily.