BA

LONDON: British Airways canceled all its flights from London's two biggest airports on Saturday after a global computer system failure caused confusion and chaos, with thousands of passengers queuing for hours and planes left stuck on runways. The failure, caused by a power supply problem, disrupted BA's flight operations worldwide and also hit its call centers and website, said Alex Cruz, the chairman and chief executive of BA, part of Europe's largest airline group IAG. "All of our check-in and operational systems have…