 A second confrontation with the UK authorities occurred in 2007 when Ahmed was captured at London's Heathrow Airport following his arrival from Pakistan.On this occasion, he was charged with "directing the activities of an organization which was concerned in the commission of acts of terrorism", "possessing three books containing information which would be useful to a person committing or preparing an act of terrorism", and "possession of a rucksack containing traces of an explosive, in circumstances which suggested it was for a purpose connected with terrorism".In December 2008, Ahmed was convicted in the UK of "directing the activities of an organization which was concerned in the commission of acts of terrorism".