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What are the world's busiest airports? See the latest list as London Heathrow is shut down by a fire
London — The sudden, full-day closure of London's Heathrow Airport on Friday caused by a fire in a nearby electrical substation threw the travel plans of an estimated 200,000 people into disarray.
Thousands still stranded by Heathrow shutdown as government says 'questions to answer'
A fire at an electrical substation has caused a "significant power outage" and the closure is expected to last until midnight ...