I was just there when it happened,, I had friends ringing me asking if i was alright, the tv companies were showing the before the explosion and they saw me standing there talking to some guy , 5 mins before it went off,, I have always thought this was a botched Surveillance, because there were two cameras operating as they showed what happened,, and for some reason, both cameras were watching and following the bomber ,, first one, for some reason, was pointing down the street watching him approach, then when he enters , the second camera follows him, as he enters, follows him as he walks to the bench, and then follows him as he sits down, and again when he gets up and walks out,,, the cameras paid no attention to anyone else,, its as if they knew he was coming and had the camera people watching him,, I even pointed it out to a journalist , and stated, as they knew he was coming,, they can not admit that,, but he will be conveniently caught within a couple of days,,, and he was . so I think they thought he was doing a rehearsal , but screwed up because obviously , it was not.