On 911 there were several anti-terror drills, among them a dress rehearsal for a scenario where the terrorists are using airplanes to hit tall buildings. In London on 7/7 2005 there was an anti-terror drill going on involving 1000 persons, where the scenario was simultaneous attacks on buses and subway stations.
The second is a fact, it's in an interview:
http://portland.indymedia.org/media/media/2005/07/322343.wmvAre the drill on 911 verified by news media or any credible source? And if so, what to think of this staggering coincidence?