During the Hamburg Cell planning of Sept 11th? Yeah, how could you have guessed?
Yep! I have been there between 1991 and 1996 for studying architecture and was even a few times in the institute where Atta was registered as a student of urban planning (something different to pure architekture) between 1993 and 1999, but never ever met this guy.
Nevertheless there is a fundamental difference to plan a terrorist attack and to take over a city through riots and to slaughter 1.000 infidels. To claim such BS is really dumb and idiotic propaganda.