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**Posted by Phineas
Fox News’ Catherine Herridge breaks the story:
Fox News chief intelligence correspondent Catherine Herridge reports that the bombs used in the Boston Marathon attack did not rely on cell phone detonators, using a “line of sight” speed controller from a remote control toy car as the trigger. It is not known what the range is on the specific controller that was used, but it is typically 250 yards or less.
The national security source, who spoke on condition of anonymity, said it is believed one or both of the brothers used the controllers to detonate the bombs, but the involvement of a third person to trigger the devices still has not been ruled out.
An important fact mentioned is that the type of controller used is not described in al Qaeda’s “Inspire” magazine, which has articles educating terrorists on how to make bombs.
What’s even more interesting to me is the passing mention in the video that the Tsarnaev brothers had apparently made their bombs without experiencing failure or a “workplace accident.” I’d wondered before where they (or, at least, the older brother) had tested their devices without anyone noticing. This would suggest strongly that Tamerlan, the older brother, got his “education” outside the country, probably during his six-month trip to Dagestan.
It’s possible, perhaps probable that one of the Tsarnaevs worked the controller, then ditched it in the days before they were killed or caught. But the information in Herridge’s report about the possibility of a third party shows that we don’t yet know nearly enough about what happened.
RELATED: Speaking of “who else may have been involved or known,” Jester has a hunch. It also bears directly on the “where did they test the bombs” question. Worth reading. Also, at Hot Air, the bombs showed “training or expertise.”
(Crossposted at Public Secrets)