posted on Apr, 16 2013 @ 05:30 PM
Considering the bomb casings were 6 liter pressure cookers (as was reported in the FBI news conference earlier). I would think that no trigger device
was necessary. This would allow for the bomb planter(s) to be no where near the area once the bombs detonated.
With that casing, it leads me to believe that a chemical concoction was used that built pressure over time. However, it is my gut feeling that they
were supposed to go off 2 hours before they did. I am thinking the concoction took longer to build the adequate pressure to go off than when it was
intended to, albeit they were pretty close together. Which would seemingly require more than one person to pull off.
This would also give credence to why they went off after the race had been going for over 4 hours and not the more opportune time (as has been
mentioned in the media) at the two hour mark when there would have been more of a presence of people.
edit on 4/16/2013 by UberL33t because:
(no reason given)