The security of the library is detected by the magnetic induction of the magnetic stripe in the book. Maybe the power supply or other parts of your computer are close to the magnetic induction of a book in the library, and you call the police. Airport security is mainly X-ray security machine and metal detection security door. The X-ray machine is mainly for perspective. The security door will ring when the metal is used, but the security inspector will ask you to use X-ray machines for all your bags during the inspection. There is definitely no problem flying.