In this grab taken from video made available by @HLOBlog, a man is surrounded by armed police after an incident on London Bridge, in London, Friday, Nov. 29, 2019. A man imprisoned six years for terrorism offenses before his release last year stabbed several people in London on Friday, two fatally, before being tackled by members of the public and then fatally shot by officers on London Bridge. (@HLOBlog via AP)