Military explosives?
Also need to investigate the source of the explosives since they're reported to be military in origin.
Times Online
July 13, 2005
A EUROPE-WIDE investigation was under way yesterday to uncover the source of the military explosives used in the bombings.
Traces of military plastic explosive, more deadly and efficient than commercial varieties, are understood to have been found in the debris of the wrecked Underground carriages and the bus.
