The reason for this thread, stated a number of times by Seeker PI, is gradually penetrating my thick head. Here is a contributory link that might get
us on the road to nailing down the number.
www.hq.usace.army.mil...
The site enumerates the large number of considerations that go into assigning risk in low probability but high consequence risk situations. You can
bet that someone in the insurance industry did the calculations and laughingly said "Sure we'll give you a policy, sucker." It must have seemed
almost like insuring the Great Pyramid against a terrorist strike. These were the first steel buildings in the history of modern construction to
collapse. I believe I read a quote from a scrap metal industry person somewhere that said they had never seen beams that big in his industry before.
Well, there's a reason for that. Very few, if any, old skyscrapers have been taken down in controlled demolitions. None have collapsed.
How do you calculate the odds against something happening, which has never happened before? What are the odds against George W. Bush being shot out
of a cannon at the circus? Maybe that's where the word risk enters the picture.