He, as a 9/11 family member, makes a persuasive emotional argument. However, he is unaware of, or ignores, a special type of blindness people develop when doin

He, as a 9/11 family member, makes a persuasive emotional argument. However, he is unaware of, or ignores, a special type of blindness people develop when doing repetitive tasks like searching baggage. People will only see the common, ignoring the uncommon all together. An example of this is the gorilla and basketball experiment. TSA emploies have a similar problem they will only see the common things they need to confiscate, small knives and water bottles, but miss the rare and dangerous stuff, guns or bombs. They have done studies where they send a bag though airport screening with a bomb and a water bottle in it, and what happens frequently is the TSA will find and confiscate the water bottle but miss the bomb. This is not a fault of the TSA being incompetent it is because the TSA emploies humans. By allowing small knives through not only does it make passengers happier it makes it so that the TSA is not distracted from real dangers.