What would happen if all those screens tracking all those flights suddenly went blank?
With cyber attacks targeting everything from ATMs to nuclear facilities, some security experts think airlines could be next.
Airport personnel claim their closed systems are secure and that safeguards are in place to ensure Since pilots are trained to fly visually, a cyber attack could cause a massive disruption, but not necessarily a disaster.
Around the world, around the clock, circles of flickering screens keep aircraft apart in the air, ease them gently down to the ground and guide their precious human cargoes off the runway.
This finely choreographed global ballet of speeding metal, fuel and flesh moved almost five billion passengers in 2009, according to data from Airports Council International.
But what if all those screens went blank?
Computers are vulnerable to cyber attack -- and that worries the world's intelligence community.
The head of Interpol, Ronald K. Noble, issued a stark warning to the international police agency's first ever cyber-threat conference in Hong Kong in September.