Computer fault identified as flight chaos abates

LONDON (Reuters) - A system failure affecting air traffic control workstations was to blame for disruption to thousands of passengers coming in and out of Britain's biggest airports, officials said, as services returned to normal on Saturday. A small number of flights remain delayed or cancelled at London's Heathrow Airport, which calls itself the world's busiest international airport, according to its website. Air traffic officials said Friday's system failure occurred durin