At around 14:00 UTC today, a man climbed over the perimeter fence and made his way onto the North runway, 27R, at London's  Heathrow Airport, the United Kingdom's largest airport. The man, who was carrying a rucksack, then attempted to run in front of a plane on the runway,  however it is believed that he was tackled to the ground by armed police before reaching the wide runway.
The number of security screeners in US airports will be reduced.