Chaos descended on air travellers last week after authorities in the UK revealed allegations that terrorists planned to blow as many as 12 airliners out of the sky. Revelations that the plotters intended to use explosives made from liquids led to bans on liquids and hand luggage. Beefed-up security at airports created long queues, desperate delays and flight cancellations. It also provoked questioning of what more can be done to safeguard aircraft from terrorist attacks.
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