USAF F-16s were scrambled the other week to escort a US airliner inbound to New York's Kennedy International from London Heathrow after two male passengers had 'acted strangely' on the flight. The full-scale security alert was triggered after the unnamed pair had made several trips to the lavatory together, and on being asked to remain in their seats by the crew, had refused to co-operate. On landing the two were arrested and admitted, among other things, to have smoked drugs in the lavatory. However the report concludes "the men were not found to be carrying any drugs, and were not charged. When the plane touched down, authorities said, they were both fast asleep."
Source: Flight International