1) Our airport technology is outdated. We look for metal, and the new explosives are made of plastic.
Every strategy we have is reactionary.
3) We only focus on security when people are heading to the gates. Aviv says that if a terrorist attack targets airports in the future, they will target busy times on the front end of the airport when/where people are checking in. It would be easy for someone to take two suitcases of explosives, walk up to a busy check-in line, ask a person next to them to watch their bags for a minute while they run to the restroom or get a drink, and then detonate the bags BEFORE security even gets involved. In Israel, security checks bags BEFORE people can even ENTER the airport.