He was previously convicted on terror charges and released from prison last year after serving less than half his sentence. Phil black has more. What more are you learning about these bystanders . Here in london today, there is tremendous anger felt towards the attacker, sorrow for those harm and killed, but also a great deal of gratitude and admiration of those who stepped in so quickly and without much concern for themselves and stopped him from harming other people. Particular tholy those two, who improvised, grabbed what they could then used them effectively as weapons to slow down this mans assault. You mentioned the fire extinguisher. That was blasted in his face to slow down and confuse him then someone else grabbed what you could describe as an unusual weapon. The tusk of a small arctic whale. It was hanging on a wall inside the building where this started. That was then used to prod and drive the man into a position, to corner him against a wall when more people raced in from