Heathrow, London's main airport, is normally thronged with cross people in queues at this time of year. But on August loth the lines became serpentine and the people in them more anxious than querulous as news spread that the police and security services had been working overnight to interrupt a plot to blow up a dozen planes bound for America. Passengers were allowed to carry only cash, passports and travel documents onto their flights. Liquids, and anything that could conceal a detonator, were whisked away. Mothers were made to sip baby milk before being allowed to take it on board.
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