How far is The Stoop in the western suburbs of London, England, officially the Twickenham Stoop Stadium, the home stadium of both Harlequins rugby union team and Harlequins Rugby League who play in the Guinness Premiership and Super League respectively from London Heathrow Airport or Heathrow, located in the London Borough of Hillingdon, the world's busiest airport in terms of international passenger traffic measured in The kilometre (American spelling: kilometer), symbol km, the unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in of a seconds?
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