This undated photo provided by West Midlands Police shows Usman Khan. UK counterterrorism police are searching for clues into an attack that left two people dead and three injured near London Bridge.  Police said Saturday, Nov. 30, 2019, Khan, who was imprisoned six years for terrorism offenses before his release last year stabbed several people in London on Friday, Nov. 29,  before being tackled by members of the public and shot dead by officers on the London Bridge. (West Midlands Police via AP)
Terrorist Usman Khan killed two people near London Bridge after attending a deradicalisation programme. AP

UK terrorism watchdog says deradicalisation programmes do not work