I've never boarded a plane in Germany, but in every other country I have (a few in Europe, several in Asia, and the US for sure), you have to show ID and boardi

I've never boarded a plane in Germany, but in every other country I have (a few in Europe, several in Asia, and the US for sure), you have to show ID and boarding pass to airport security, and some countries also required it when going through passport control.