Some of the hundreds of people who were held by the US authorities at Guantánamo Bay detention camp in Cuba were British-based. Seven of them are starting a legal challenge to prevent the destruction of any alleged evidence of government collusion in their detention.
The BBC has been speaking to several of those who were held to find out what happened when they returned home. The testimonies give evidence of the failures of Western states to ensure the rule of law and to protect human rights in the fight against terrorism.
