Now, I'm going to shift gears over into learning from failures and mistakes, I can't remember where I came across this. You must learn mistakes from others, and this was Andy's comment, he said, "It's much better to learn from other people's mistakes." Then when I came across Sam Levenson's quote, I just had to put it in here. "You must learn from the mistakes of others because you can't possibly live long enough to make them all yourself." Very true. I agree with that, so I put that in there. So, I don't want to bore you. How many people have seen a video of the Tacoma Narrows Bridge Failure? Three? Four? All right, I'm going to let it roll. A law that no man can fail to hear. In a 40 mile an hour deal, the center spammed winds like a ribbon, and a queen clip like you wouldn't believe possible, and let could see as you do now. There's another mobile covered in the video roadway. The 11,000 tons swift and swing as giant tables of performing. Tables of 6,300 wire plan, each 17 inches thick. Backup at the danger zone all second spectators are driven to safety as the bridge gyrate like a nightmare, high above the river, twisting, turning, curling. The lone motorist [inaudible] in the car, he has but a few minutes in which to safe himself, face to face with fate, his destiny hanging in the balance will he heed the last warning or [inaudible] doom factor having saved himself five seconds. No structure of feeling incomplete can stand such a scene, filled with buckle and giant table's map like the only plan. There it goes. Engineers are divided as the- Okay. So, what happened there was as the wind was coming down the canal and channel, and it happened to be blowing at just the right intensity and frequency. It setup a sympathetic vibration in the bridge, and caused it to start oscillating like this, and then over time the reinforced concrete has iron rebar and it was breaking and the cable started breaking and then it was just a cascade failure after that. Hear that, they no longer do wrong now. Not a civil engineer, I don't know, but great learning happened from this. Whatever that learning is or was subsequently deployed in bridges all around the world, because they were building bridges like this and they had never had this problem before. But, mother nature just delivered the right set of stimulus that they hadn't anticipated. So, I imagined simulations and wind tunnel, and I don't know what all.