Sheldon H. Jacobson

From a removed distance, airport security can be viewed as a chess match between two players. One player is intent on protecting the aviation system; the other wants to cause harm to it. The game temporarily ends with a successful attack, immediately beginning again with a new target. The objective of the perpetrators is to play each game as quickly as possible, while the protectors work to ensure that the game never ends, or that the perpetrators choose to stop playing.