This is just my opinion but these photos have been in the hands of law enforcement for quite some time. They have checked with every database in the US cross checking passport,drivers license and mug shots. NO HITS. They have shared these photos with many agencies NO HITS. If these two were members of any watch group they would have a jacket. This points to foreign operators to me.
On that note why has the CIA director not been at all these meetings per the press just FBI and Justice. Incompetence?
I think your right..also..remember how the New York Marathon was canceled due to Superstorm Sandy and people were pissed at Nanny Bloomberg for doing so..I have a feeling that this bombing was supposed to happen at the New York Marathon but since they couldnt do it then, decided to do it at the Boston Marathon..these may be sleeper cell types and are probably long gone by now