To Mexico

This time my trip goes to Mexico to visit Alvaro and Tania.

So my first awesome => long day starts at 3:13 am at my parents house, as a whatsapp message wakes me up 2 minutes before my alarm clock was set to ring. As it is just a bit blow freezing and the streets are well salted, it is a easy drive to Vienna airport.
From there my trip goes to Frankfurt Germany. Because I travel to USA I need to have another security check there, and lucky me, they perform a random extra security check with my stuff. Then I'm questioned about all kinds of USA immigration stuff and have to wait to get a new boarding pass, as the one I already have is not valid.
The flight via American Airlines is quite nice. I talk the whole flight. The food is kinda ok for a flight. What I do not understand is, why I do need to have an ESTA and immigrate to the states. And because I fly to Mexico I was chosen for an additional security check. I told the guys that I my flight is going in a few minutes, and they just answered, that this is more important, I can get another flight.
Gladly my flight is delayed and the ground personal does not know when the plane will arrive. Also they have no idea, if I need to pick up my luggage and transfer it myself or whatever. So I used my time to find some free internet...
Before my 3rd flight I had my stuff already x-raided 4 times and 2 additional security checks.