Maulana Fazlullah in a speech last night on his FM channel said that a recent attack on a police station in Mingora (the largest town in the Swat valley) was akin to a pressure cooker blast.
Often, when models for buildings are developed, material resistance to blastpressure and fire are unknown, as is the lifetime of materials, microstructure and stresses.
Military officials hoped the MOAB would create such a huge blast that it would rattle Iraqi troops and pressure them into surrendering or not even fighting.