To fix this, those in charge of airport security need to make a choice: Either a 115ml bottle of saline is a potential bomb, or it isn’t. If it is dangerous, treat is as dangerous and treat anyone who tries to bring one on as potentially dangerous. If it’s not dangerous, stop prohibiting it from being taken onto airplanes.
Trying to have it both ways just distracts the security screeners from actually making us safer.
Bruce Schneier is a security technologist and author.