Explosive Mixtures News Today

And the fbi said, it is looking for a man who was carrying an unusually heavy black bag. >> the bag would have been heavy because of the component believed to be in it. >> reporter: the fbi has other clues in the videos. the white smoke seen after the detonation indicates a bomb built with low-velocity explosive mixtures, not military grade. >> they may not have had the resources as weve seen in other bomb attacks, but they knew how to make the bomb go boom. >> reporter: experts say the large pi...