I don't know what is so hard to understand about it. There has always been a dispute over- whether or not the airliners alone could drop the World Trade Center Buildings on 911. Some people thought that that was impossible because fire and heat from the two crashes could not warp/melt the steel enough to drop the buildings and disputed that there was extra explosives planted in the buildings to help drop the buildings because the airliners could not have done it alone. Now, they have recently proven that fire and heat alone COULD cause a skyscraper to collapse. They recently evacuated a building and dropped it by heat alone and proved that it could be done this way. I can't explain it any better than I did in my original post. It has been in the news for a week now. Where have you guys been?