Disarming Iraq is legal under a series of U.N. resolutions. Iraq is in flagrant violation of U.N. Security Council resolutions.
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.