The explosive used was PETN which is very difficult to make and very difficult to detect. You pretty much need a spectroscope. Generally airports and ports are

The explosive used was PETN which is very difficult to make and very difficult to detect. You pretty much need a spectroscope. Generally airports and ports are set up for detecting things like explosives you cooked up yourself or stolen mining equipment or whatever. Military grade explosives are expected to be chemically tagged because they’re for, y’know, legit military use and not terrorism. https://en.m.wikipedia.org/wiki/Convention_on_the_Marking_of_Plastic_Explosives https://en.m.wikipedia.org/wiki/Convention_on_the_Marking_of... I can’t find anything on whether or not the PETN that Israel used was tagged. If not, it would be yet another layer of irresponsibility. Unexploded ordinance is very real, as the recent news about the WWII era bomb blowing a hole in that airport runway in Japan attests to.