While the Sears Tower arguably the greatest skyscraper engineering so far, it's incredible that architects and engineers have abandoned the quest for world's tallest building.
unlikely
One-half mile
The tallest building Built by architects and engineers . He also asked them to build a building higher than this or not .
Johns said the engineer building can be taller than a building one mile to Shea .
Barry and architects say that this technology can generate up to 500 floor building .