Oh wait....I found it and did a quick screen cap. Looks like the balloons go into the air as a result of the bombing. Still interesting.
Of course if stripped sleeve lady was the trigger she didn't need the balloons as a signal since she was right there.
That thing with the balloons is interesting. I had read on one of these threads that the balloons were seen going up like this, but I had not seen such a video myself.
One would hope that investigators have checked out the two women, but as far as I know, no one has put out anything to the public seeking the identities of the women, and from the video there is not much to go on.