The FBI and Department of Homeland Security today issued an analytical "note" to U.S. law-enforcement officials cautioning that al-Qaida terrorists have in the past expressed interest in attacking public buildings using a dozen suicide bombers each carrying 20 kilograms of explosives. Authors with the U.S. Office of Intelligence and Analysis added that they have "no credible or specific information that terrorists are planning operations against public buildings in the United States." *snip* According to the note obtained by NBC News, a "recently discovered audio recording of al-Qa‘ida training sessions conducted several years ago provides instruction to potential suicide terrorists on...