This event has some similarities with the 7/7/05 London bombings.
On the morning that the bombings took place, a terrorism expert named Peter Power and his private company were running a rehearsal of such a scenario involving exactly the same tube stations, at exactly the same times that the incidents occurred.
It is difficult to debunk this version of events, given that Mr. Power himself talked about it to several radio stations on the afternoon of 7/7/05, and further confirmed it shortly after when attempting to downplay its significance. This is a little like winning multi-million dollar lottery prizes on three successive days, and then shrugging it off as normal.
Perhaps as interesting is the fact that among mainstream media outlets across the world, only one (the CBC in Canada) covered it. Everywhere else there was silence.
Colman Jones, an Associate Producer on CBC: Sunday, claimed in his blog that, while escorting participants from the CBC building, he enquired of Power 'why there had not been more media coverage of this.' 'They were trying to keep it quiet,' Power purportedly responded, with what Jones called 'a knowing smile.'