By Naomi Grimley
A three-year review into the future of air travel around London is due to finish with the recommendation that a new runway be built at one of two existing airports. But while the capital gingerly edges towards airport expansion, other parts of the world are witnessing a massive airport building boom. Along the Black Sea coast, 21 miles (35km) from Istanbul, an army of trucks and construction workers are labouring round the clock to build one of the world's biggest airports. The project was only announced two years ago by the Turkish government and yet it's due to open in 2018. Once fully complete, it will boast six runways and cater for 150 million passengers a year, travelling to 350 destinations. Or to put it another way, it will have more than twice the capacity of London Heathrow.
