The attacks on the World Trade Centre and the Pentagon were very carefully chosen targets. They were the heart of the military industrial complex. I really somehow think this is a little jittery nerves, but I hope to god I am right.
Bali - nightclub
Spain - commuter trains
France - Paris Metro
UK- buses and underground trains
The threat was real but in the spirit of this kind of terrorism there may or may not be any bombs. Only hindsight can tell. In the meantime who can blame the German state from wanting to protect its citizens?