Why do we have to surrender all the water before entering the airport even if we prove that is in fact a drinking water by taking a sip?

Question

But once inside the airport terminal, we can always buy some water and no one will check anymore if you bring the water inside the plane.

In: 974

Answer 1

Because some terrorists are willing to die to carry out their terrorist attack. So drinking something that you claim is “water”, it could be that you are a terrorist and are drinking something you know will kill you, and will be used to make an explosive.