It seems people are in conspiracy theory mood at the moment. I suppose you can't blame them with the NSA revelation.
I highly doubt Bev is into conspiracy theories let alone in the mood. What she did, she looked into the content of that link and found some stuff confusing because it does raise a few questions.
I did the same because unlike some other posters here, I am not afraid to look and also, how am I to dismiss anything if I don't even know that the link is all about or what evidence they have against it? I don't believe all conspiracies are true but that doesn't mean some aren't true because they are.
The bombing definitely happened and some innocent people did die, there's no question about that. However, the theory is, it was an inside job and one particular scene was staged and that link is only talking about that particular picture. It's done shot by shot and given very good explanation behind every shot. Also, this event has some serious inconsistencies and as a result, it's raising all sorts of questions. There was a drill by FBI prior to that event and one marathon runner who was practicing there at that time, had asked the FBI what was all that about and he was told that it was nothing but a regular drill. The marathon runner obviously didn't feel comfortable after that. The talk is, FBI doesn't do drills unless they 'suspect' something.
I don't know if you checked out the link but it also has some videos, a couple I believe, and one of the videos 'the naked man' again raises a lot of questions.
I myself didn't understand a few things during the event. For instance, the older brother was already interrogated by FBI in 2011 and yet, after the bombing, their pictures were shown on TV with a tip line and FBI totally pretended as if they didn't know who he was. They, of all people, should have known who they were especially the older brother. The Aunt also raises a valid question, why were the brothers walking apart (captured on the camera; one few feet behind the other) rather than side by side? With today's technology, anything can be done and shown as if it's real and taken directly from the scene.
Anyway, I've concluded that that particular picture in that event was staged and that, some other things not only they don't make sense, but also, they are rather inconsistent. Who's responsible for it I don't know. But I definitely won't put my trust in someone I don't even know and especially someone who's in power.