Some years ago, I saw a series of programmes on C4 which followed the creation of a new skyscraper in Madison Square Gardens N.Y. right through from the demolition of the old buildings to the finish of new one which was indeed very high. The whole series was very interesting but one thing has stuck in my mind. As the building was approaching heaven, the manpower needed became crucial because the workers who had happily taken it upwards just could not cope with the heights that were now needing building. They DID have to engage a specialist team and this consisted totally of native americans (red-indians). They just had no fear of heights at all and they walked along a three-feet gangway the same whether it at the bottom or top. Seeing them striding along without a care certainly made me queazy. No explanation could be offered as to why these men were built this way!