London bomb tactics linked to Iraq.

On Friday, London was “gripped by a terrorist threat” when “police found two Mercedes sedans packed with gasoline, nails and gas canisters.” The New York Times notes that the “idea of a multiple attack using car bombs — a departure from the backpack suicide attacks of the London bombings of July 2005 — raised concerns among security experts that jihadist groups linked to Al Qaeda may have imported tactics more familiar in Iraq.”