Shaker Aamer has paid tribute to his supporters on his return to the UK.
Mr Aamer, who was the last British detainee at Guantanamo Bay, said: "Without their devotion to justice I would not be here in Britain now".
He thanked Allah, his wife, family and children, and his lawyers, as well as everyone else who supported him and campaigned for his release.
I feel obliged to every individual who fought for justice not just for me but to bring an end to Guantanamo.
Without knowing of their fight I might have given up more than once; I am overwhelmed by what people have done by their actions, their thoughts and their prayers and without their devotion to justice I would not be here in Britain now.
The reality may be that we cannot establish peace but we can establish justice. If there is anything that will bring this world to peace it is to remove injustice.
Who will mourn Guantanamo Bay? Hardly anyone.
Shaker Aamer spoke to ITV News last week via his lawyer in his final interview before his release from Guantanamo.
Shaker Aamer, the last British detainee at Guantanamo, has been put on a flight back to the UK. Here's what we know about him.