these mass shooters are not strangers. these could be someone you know, could be someone planning a serious event. and the only way that we can stop these is if we recognise the warning signs and we do something about it. i think we can't ignore the fact that these are our friends, can't ignore the fact that these are ourfriends, neighbours, partners, our friends, neighbours, partners, children ourfriends, neighbours, partners, children and we have to recognise that people who we know are capable of doing this. that is why i've decided that i needed to share the fact that i knew them. i had no idea that they were planning this. but i think we all need to recognise that we have a part in creating a safer world. , :, :, , we have a part in creating a safer world. , . ., , ., we have a part in creating a safer world. , . . , . , ., we have a part in creating a safer world. , . . , ., , ., ., world. krista hanley, a survivor of the columbine _ world. krista hanley, a survivor of the columbine shooting _ world. krista hanley, a survivor of the columbine shooting and - the columbine shooting and co—founder of we're safer together i'm a personal safety organisation, thank you very much for sharing your experiences with us today. since columbine, gun violence in the united states has become increasingly severe —