[wiredfool]

In Zurich, you can buy Swiss army knives in the secure zone.

[xxs]

That's ok - 6cm blades are allowed. You can also carry it in a cabin luggage anyways.

realistically any broken glass bottle can be used as a blade.

[adrian_b]

Whether they are allowed or not, probably depends on the place.

In Germany, at Frankfurt, I had to dump in a garbage bin a smaller Swiss army knife, to be allowed to pass.

I had it because my high-speed train of Deutsche Bahn had arrived more than one hour late, so there was no time to check in my luggage.

After losing the knife, I ran through the airport towards my gate, but I arrived there a few seconds after the gate was closed. Thus I had to spend the night at a hotel and fly next day, despite losing my knife in the failed attempt to catch the plane. Thanks Deutsche Bahn !

[sejje]

Realistically, you could bring a nub of copper or steel or antler, and your glass bottle, and knap an excellent knife in a few minutes.