Switzerland is to all intents and purposes a member of the Schengen (free circulation of criminals, illegal immigrants, trafficked people, Nigerian scammers) area, and of the European Economic Area, but remains outside the EU.
The airport has a French side and a Swiss side.
Almost correct. By popular vote the citizens of Switzerland declined to join the European Economic Area. Switzerland's relationship with the EU depends on numerous 'bilateral accords' but this does not include the automatic adoption of EU Regulations and Directives into Swiss law - everything must be approved by the Swiss Parliament first - and in many cases by a majority vote of the population and the 26 cantons.
Can't understand why more power isn't devolved to the people in Europe - the Swiss system works.