Saifullah (now aged 75) was kidnapped in 2003 while on a business trip and tortured by US personnel in Afghanistan. A year later, he was flown to Guantánamo in shackles and imprisoned there for 18 years without charge or trial.

He was unanimously cleared for release by six US intelligence agencies in May 2021 – more than a year ago. He was finally let go on Friday and is back with his family in Pakistan.

There are still over 30 detainees in Guantanamo. Most held without charge or trial. A dozen captives were subjected to a sort of US military commission charge but only two were convicted under that flawed system.

This has continued under George W Bush, Obama, Trump and Biden.