Sorry if this is a bit redundant, but I've been reading this thread and googling "schengen" to better understand...
I am flying JFK-AMS-GVA on KL metal and then the reverse on the way back, and I believe it's the first time I've been to Europe via a connecting flight - at least that I can remember. I have a 2-hour layover in AMS. I see that the Netherlands and Switzerland are part of Shengen, so what does that mean for where I go through customs/passport security -- in AMS or GVA?