New Delhi, April 1 -- IndiGo on Tuesday named William Walsh, a former British Airways chief executive and the current head of the International Air Transport Association (IATA), as its chief executive officer - closing a leadership gap that opened three weeks ago when Pieter Elbers resigned in the aftermath of the worst operational crisis in the airline's history last year. Walsh brings to IndiGo a career that spans the cockpit and the boardroom. He began as a pilot, rose to lead Ireland's Aer Lingus, then served as chief executive of British Airways from 2005 to 2011. .P11...