Thanks for the post sir.
Flagged so others will see
I would not like to live in a city with an airport on top of me.. Imagine if there is a leakage or an explosion.
It will be raining concrette and so metal.

In an old (1938) issue of Modern Mechanix, we read how an unnamed "French engineer" once proposed, "as a solution to the problem of locating an airport in the heart of any big city, a design for a long orientable runway, which would be mounted on circular tracks atop tall buildings." This megalithic, concrete, aerospatial earth machine would "orient" itself along specific air routes, hurling planes aloft over the rooftops of the city.