Security was stepped up the following year after Osama bin Laden issued a general threat to kill US military personnel.

BBC: How the US became a target

Ms Landa's father has also been charged with making a threat to kill Harjinder Singh and unlawful possession of a knife.

BBC: Kidnap accused family 'did not accept partner'

The parents paid the ransom without informing the police, having believed the abductors threat to kill their child if the police were involved.

FORBES: Fact and Comment