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To: Nadine Carroll who wrote (126866)7/22/2005 12:35:44 PM
From: Elsewhere  Read Replies (1) | Respond to of 793782
 
telegraph.co.uk



To: Nadine Carroll who wrote (126866)7/22/2005 12:45:49 PM
From: LindyBill  Read Replies (1) | Respond to of 793782
 
Then why did all the bombs work on July 7, but all the bombs failed on July 21?

If this early report turns out to be true, my immediate guess would be, "different bomb assembler."



To: Nadine Carroll who wrote (126866)7/22/2005 2:55:52 PM
From: jlallen  Read Replies (1) | Respond to of 793782
 
The explosive compound (TPTA) used is highly volatile and must be mixed precisely and then used quickly to be effective. My understanding is that the detonators went off but the explosives only caught fire....which is what happens when TPTA is (and most explosives)mixed incorrectly or allowed to oxidize. My understanding is that TPTA was used in the first round of bombings too.

J.