Zoos are becoming facsimiles - or perhaps caricatures - of how animals once were in their natural habitat. If the right policies toward nature were pursued, we would need no zoos at all.
Luckily, the plan failed because of overcrowded parking and the truck that carried the bomb was not able to get close enough to its target location. Had their plan worked, it would have brought the towers down faster than the 9/11 attack and resulted in a higher death toll.