Britain's domestic intelligence agency didn't act swiftly enough on key information and missed a significant opportunity to prevent the suicide bombing that killed 22 people at a 2017 Ariana Grande concert in northwest England, an inquiry found Thursday.
Retired judge John Saunders, who led the inquiry into the Manchester Arena attack, said that one MI5 officer admitted they considered intelligence about suicide bomber Salman Abedi to be a possible national security concern, but didn't discuss it with colleagues quickly enough.
