This question is one of the ultimate questions of our time: how far do we go to protect our country from terror attacks and yet preserve our own privacy? The court allows the minimal invasions of privacy such as the X-ray machines, the body scanners and, if an alarm sounds, the personal searches for the safety of the passengers on the plane and the prevention of disasters in the air. No one has forgotten what happened on 9/11 when planes full of passengers were used as missiles, and many people died. As a result, most people in this country agree with the courts that some measures for safety are acceptable. To go further in searches which invade privacy, some indication must be present that would allow more invasive measures. In the link below, look for the government policies towards terrorism as the most helpful section.