TAPT explosive blows up without flames.
http://www/newscientist.com/article.ns?id=dn6925
-New Scientist article about TATP Explosive
"The explosives claimed to of been used in the bombings is TATP which does not burn when it detonates. Instead, its molecules simply fall apart. A video showing TATP being detonated showed that it can do so without producing any flame whatsoever. The reason is, TAPT dosen't use oxygen, and hence dosen't combust like "ordinary" explosives."
- Jenny Hogan New Scientist January 2005 (Article about TATP
SO why the hell do eyewitnesess say they saw an almighty flash and fireball and why were so many victoms trated for serious burns injuries if the bombs contained TAPT?
TAPT is extremly unstable explosive in large quantities. Richard Reied the "Shoe Bomber" used TAPT to detonate PETN. He diden't use TAPT on its own becuase its extremly unstable in large quantities.
How could 40lbs of TATP in 4 rucksacks get hauled around London without going off?