IRA ceasefire 20 years on - former top cop talks about complicated relationship with Martin McGuinness

Yesterday marked 20 years since the IRA ceasefire was announced in 1997. It paved the way for Sinn Fein to enter talks which ultimately led to the Good Friday Agreement. One man who helped to deliver that commitment was, of course, the late Martin McGuinness. The chief executive of Co-operation Ireland, Peter Sheridan, had a complicated relationship with the former deputy first minister and IRA commander. Peter served in the RUC and was the most senior Catholic within the PSNI, reaching the rank of assistant chief constable. He's given a wide ranging interview to the Irish Times to mark the ceasefire anniversary. Stephen has been speaking to Peter. He asked him if he could think back to 1997 and remember what he thought Northern Ireland would be like in 20 years?