Large numbers of people pass through airports every day . This presents potential targets for terrorism and other forms of crime because of the number of people located in one place . Similarly , the high concentration of people on large airliners increases the potentially high death rate with attacks on aircraft , and the ability to use a hijacked airplane as a lethal weapon may provide an alluring target for terrorism ( such as during the September 11 attacks )
September 11 attacks
September 11 attacks
Airport security