> My question is: why so much air surveillance? I live in Germany. The only times I hear a helicopter is if someone is being rescued or if someones missing.

Relevant German song concerning this mentality:

Foyer des Arts - Hubschraubereinsatz (1982)

https://www.youtube.com/watch?v=2pAr1IMiP6A

Here is some video of the song that also shows the lyrics:

https://www.youtube.com/watch?v=ykRB9SVlDhU