US gun violence

US schools walk out over gun violence. Video, 00:01:01US schools walk out over gun violence

US students decry gun violence in walkout

US police clear classroom after shooting. Video, 00:00:58US police clear classroom after shooting

'Law enforcement has been demonised' Video, 00:00:26'Law enforcement has been demonised'

US TV host quits over shooting tweet

Teachers get 16in bats to fight shooters

Why are female mass shooters so rare? Video, 00:01:53Why are female mass shooters so rare?

YouTube HQ attacker used shooting range

Female shooter 'had railed at YouTube'

Vegan who 'railed against YouTube'

'Chaotic' scenes at YouTube HQ. Video, 00:01:33'Chaotic' scenes at YouTube HQ

'Active shooter' at YouTube headquarters. Video, 00:00:20'Active shooter' at YouTube headquarters

Cop's close shave in barbershop gun fight. Video, 00:01:06Cop's close shave in barbershop gun fight

'Making friends won't stop school shootings'

Is gun control movement #NeverAgain too white?

The 11-year-old American with a rallying cry

'Chicago goes through this every day' Video, 00:01:47'Chicago goes through this every day'

Dunblane families join US gun law protest

Students get stones to ward off shooters

YouTube gun ban drives bloggers to PornHub

'It's easier to buy a gun than spray paint'

'Greatest nightmare - our children attacked' Video, 00:00:27'Greatest nightmare - our children attacked'