If they stop rotating, a rapid and terminal encounter with the ground beckons.

ECONOMIST: Monitor

But in the spirit of commercialism there are now plans to build a subterranean shopping complex and a huge public transit terminal from 30ft below ground level.

BBC: The battle over Ground Zero

British Airways was forced to abandon its plans of moving its entire Heathrow operations to Terminal 5 in just three days in April, after its baggage system ground to a halt, resulting in chaos in the terminal's opening days.

FORBES: Magazine Article

Even when Terminal 5 opens, this will only ease ground congestion and passenger handling.

FORBES: Magazine Article