MI5 missed "significant opportunities" to prevent the Manchester Arena bombing, a report into the atrocity has found.
Salman Abedi killed 22 people and injured hundreds more when he detonated his homemade device at an Ariana Grande concert in May 2017.
Manchester Arena Inquiry chairman Sir John Saunders released his findings on Thursday, examining whether MI5 could have done more to stop bomber Salman Abedi, 22.