Britain's domestic intelligence agency didn't act quickly enough on information that could have helped prevent a 2017 suicide bombing that killed 22 people at an Ariana Grande concert, an inquiry found Thursday.
Retired judge John Saunders, who chaired the inquiry into the Manchester Arena attack, said the MI5 failure to act swiftly led to "this significant missed opportunity." He had previously criticized the arena's staff and local police for failing to identify the bomber as a threat.
