So do I. And so did they, the twin towers of the World Trade Center. Whenever a cloud interrupted the sunshine that made their silver robes flutter chromatically, the drop in temperature caused the steel skeletons to contract a little; when it passed, they expanded again.

You and I groan in anger at times. So did they, when gales forced them to sway, although they had been designed to win that sort of tug-of-war.

All this I know for a fact; because I rigged a cable between the two towers, from crown to crown--the appellation for the inclined setback of the top floors that supported the roof, coined by Leslie Robertson, the buildings' structural engineer...