Murder of Sarah Payne - I remember her school picture being all over the news.
Holly & Jessica - I was on holiday camping with family in Wales and my parents wouldn't let me & my sister play anywhere where they couldn't see us.
9/11 (I was 8 so didn't understand, but remember sitting in front of the TV like it were yesterday), 7/7, Manchester Arena bombing.
Boston Marathon bombing - my friend was running the London Marathon not long afterwards and I was scared for her.
I've watched documentaries on news stories before I was born like James Bulger and the Challenger explosion, deeply upsetting.