UK bombs bear al-Qaeda imprint

“Make use of that which is available at your disposal and...bend it to suit your needs, (improvise) rather than waste valuable time becoming despondent over that which is not within your reach,” counselled the author of the memo, Dhiren Barot, a British citizen who said he developed his keep-it-simple philosophy by “observing senior planners” at al-Qaeda training camps.

Barot, who was later captured near London and is serving a 30-year sentence, had envisioned an attack with multiple car bombs that would detonate liquid-gas cylinders encased in rusty nails—a strategy with striking similarities to an attempt by a suspected terrorist cell to blow up three vehicles in London and Glasgow last week.

So far, however, al-Qaeda and its affiliates have relied almost solely on simple, homemade bombs crafted from everyday ingredients—such as nail-polish remover and fertiliser—when plotting attacks in Europe and the US.

The makeshift bombs lack the destructive potential of the conventional explosives that are touched off in Iraq on a daily basis. They are also less reliable, as demonstrated by the car bombs that failed to go off in London last week after the culprits tried to ignite them with detonators wired to mobile phones.

But other attempts have generated plenty of mayhem and damage, including the kitchen-built backpack bombs that killed 52 people in the London public transit system July 7, 2005.

“It makes no difference to your average person if somebody puts a car bomb out there that is crude or one that is sophisticated,” said Chris Driver-Williams, a retired British major and military intelligence officer who studies explosive devices used by terrorist groups. “If it detonates, all of a sudden you’ve got a very serious device and one that has achieved exactly what the terrorists wanted.”

... contd.