Questions have been raised over the reintegration of Islamist prisoners back into society, following a terror attack last month in South west London. Sudesh Amman stabbed two people in Streatham, before being shot by police. He had only been freed from jail a week earlier, after serving time for terror offences.
Malaysia has been battling Islamist extremism for many years and its deradicalisation programme carried out in prisons has proved successful, with police claiming a 97 percent success rate. But it's highly controversial, as our correspondent Anna Foster reports for the BBC News at Ten, presented by Clive Myrie.