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FIGURE 1-1 Hijacking and bombing incidents aboard U.S.- and
foreign-registered aircraft. 1968-1994. Sources: ATA (n.d.) FAA (1993).

anticipated health regulations, and privacy laws. The panel considered ways in which the methods could be implemented to maintain high levels of effectiveness, while minimizing health risks and increasing public acceptance. The panel also identified key factors that could affect their implementation, considering mitigating strategies and alternate screening methods for those passengers who wish to avoid  the automated system. Methods for clearing alarms also were discussed.

Because both current and new technologies require security personnel to supplement the automated system when a passenger sets off the alarm, the panel considered the operator as an integral part of the entire passenger screening system.

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