twinrider1
Diamond Member
Based on the color of the smoke and the shape of the explosion at least one expert is leaning towards black powder/smokeless pipe bomb.
http://www.usnews.com/news/articles/2013/04/15/bomb-experts-offer-analysis-based-on-details-from-boston-marathon-explosions
Other comments from witnesses seem to point in that direction as well...smelled like fireworks, heavy smell of sulfur.
http://www.usnews.com/news/articles/2013/04/15/bomb-experts-offer-analysis-based-on-details-from-boston-marathon-explosions
Other comments from witnesses seem to point in that direction as well...smelled like fireworks, heavy smell of sulfur.