Ch Supt Jon Drake from Staffordshire Police speaks out following the arrest of 23 people after the Port Vale match against Wolves yesterday.
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John Rowlands died in the attacks in 1974 - his son Paul is among victims' families calling for an inquest into their deaths to be reopened.
It's currently the biggest killer of men under 45 and men are three times more likely to take their own life than women
As the families of 21 people killed in the Birmingham pub bombings ask for a new inquest, here is a timeline of the key events.