Bombs at boston marathon

I don't like the current story.

If you do something like this at the finish line of a well covered event, you know you're going to be caught on camera. So why did they both go back to their normal lives as though nothing had happened?

If on the other hand they somehow thought they could actually get away with it, by acting completely normal and not doing anything unusual to arouse suspicion. Why would they leave the most incriminating Twitter messages ever?
(I wouldn't be surprised to find out that those twitter messages had been hacked/added at later date etc. If not however then yes they're probably guilty.)

"He (Tamerlan) was controlled by the FBI, like, for three to five years," his mother said, speaking in English and using the direct English translation of a word in Russian that means monitored.

U.S. government officials have said the brothers were not under surveillance as possible militants. But the FBI said in a statement on Friday that in 2011 it interviewed Tamerlan at the request of a foreign government, which it did not identify.

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