These are the exact dates for the interviews:

Frankfurt
October 26-29
Frankfurt International Airport
Bundespolizei Service Center
Terminal One, Departure Level, Hall A

Berlin
November 2-3
United States Embassy, Berlin
Behrenstraße 74
10117 Berlin, Germany

Dusseldorf
November 5-6
Room ZG 2.725
Terminal Ring
Dusseldorf International Airport
40474 Dusseldorf, Germany

The enrollment locations are listed in GOES as, “Berlin, Germany,” “Munich, Germany,” “Dusseldorf, Germany” and “Frankfurt, Germany.”