It strikes me that when mankind sets out to build, it is done in peace and with peace in mind. Considering, predicting, and anticipating the heights of evil-doing would prevent the progress and development of human endeavor. The WTC was well-built and maintained, but there is nothing which can be built today which would withstand the worst of evil-doing. In short, our capacity to destroy is greater than our capacity to build. The only thing which keeps a peaceful balance is the will of humankind to remain peaceful. It's a long, hard road.

Peace, Love, and Understanding.

Mooh.