It is not every day that the mad bustle that is the New Delhi airport gets a chance to upstage the swank sophistry of Changi, Singapore or sit at the same league table as the Heathrow, London. Except when it is on social media platforms: the Indira Gandhi International is the first among Asian airports and on the list of top five globally on Twitter with a similar ranking (a few notches up and down) on other platforms too. Even as it grapples with the rising swell of fliers and aircraft on the ground, IGI is learning to play by