…we only have to worry about them turning up with knives and not guns…

Indeed, turning up for school with knives…

A schoolboy is on the run after a teacher and a 13-year-old girl were attacked at a school in Malvern, Worcestershire.

The pair suffered minor injuries in the attack at Chase Technology College at about 08:45 BST.

Officers said they believed the weapon was a “long-bladed knife”…

http://www.bbc.co.uk/news/uk-england-hereford-worcester-29110687

I don’t know the circumstance but thank goodness he didn’t have access to a gun.