WATCH: Palestinian-American imam radicalized London Bridge terrorist

London Bridge terrorist Khuram Shazad Butt was radicalized by Youtube videos featuring Palestinian cleric Shaykh Ahmad Musa Jibril, who lives in Dearborn, Michigan.

Already two years ago, CBS aired this report on the danger posed by Jibril. Even under law enforcement supervision, he’s become one of the most influential figures for foreign jihadists via social media.