After a half-hour delay at the security line, the supervisor showed up, and things turned from annoying to surreal. After looking at the book and flashcards, the supervisor asked me: „Do you know who did 9/11?“ Taken totally aback, I answered: „Osama Bin Laden.“ Then she asked me if I knew what language Osama Bin Laden spoke. „Arabic,“ I replied. „So do you see why these cards are suspicious?“ she finished.