Well traveling through the Schengen area is like traveling between US states. You don't even need a passport once you're in.
If you're traveling on a non-EU passport, I don't know if entering the EU is much better. IIRC flying through Frankfurt once the customs people rifled through my carry-on for no apparent reason.
If you're traveling on a non-EU passport, I don't know if entering the EU is much better. IIRC flying through Frankfurt once the customs people rifled through my carry-on for no apparent reason.