(Before It's News)

Police believe Tamerlan and Dzhokhar Tsarnaev were specially trained to carry out the devastating attack.
More than 1,000 FBI operatives were last night working to track down the cell and arrested a man and two women 60 miles from Boston in the hours before Dzhokhar’s dramatic capture after a bloody shootout on Friday.
This is big eh? If there is such an organization, are they dangerous? Could they have links to an international group? If so, did they for example cross the mexican border to get in the US? These are all things we will have to wait for answers to. -Mort