India's largest airline IndiGo has named aviation industry veteran William Walsh as its new chief executive, weeks after the resignation of its former CEO. Walsh will join IndiGo in August after the end of his term as the director general of the International Air Transport Association. Pieter Elbers resigned as IndiGo's CEO on 10 March with immediate effect, citing personal reasons. But it was widely seen as being linked to a recent crisis that forced the airline to cancel thousands of flights,