Evidence heard at the Manchester Arena public inquiry has shown humanity both at its worst and at its best, the chairman said as he addressed families to mark the publication of his third and final report.
Sir John Saunders spoke movingly of an 'appalling loss which was so unnecessary' as he paid tribute to the 22 lives lost.
And he said that he 'can only hope that we achieve something by our efforts' - as he confirmed he found a 'significant missed opportunity to take action that might have prevented the attack'.