I am thinking OKC was a trial run - what happens when you lose a building? How does it affect the economy, the stock market and employment? What happens when a plane crashes? What happens to the airline stock and the amount of travel? What about if a military installation or vehicle or boat were hit? This was their research - little tests who's results would help in planning the ultimate attacks to topple the American economy and buy up the greatly discounted stock and "own" America.
Ok, I'm going to take off the tinfoil hat now, before I really get carried away!
Stay free...