Listened to the press conference.
Whatever they know they are not saying. And they were quite loud in saying that they were not going to say anything.
The best part of the presser was when the head of Mass State Police got up and announced that the hightened presence of local, state and federal cops, plus NG troops, not only in the Copley Square area but throughout downtown Boston, all over the T system, and out at the airport, was "to comfort the public". He came right out and said there was nothing that could be done to prevent another bomb from being exploded - that the best they might do is once they knew who did it they could watch his/her associates and maybe trick them into a sting operation.
You spend your whole life waiting for a politician/bureaucrat to say something honest, open and direct - and this is what you get when it finally happens?
stay safe.