Often, when models for buildings are developed, material resistance to blastpressure and fire are unknown, as is the lifetime of materials, microstructure and stresses.
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.
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.