It was a Wednesday morning in March, 1996, just after 9:30am, when eight-year-old Andy Murray – now one of the best tennis players to have ever lived – heard two gun shots outside his classroom at Dunblane Primary School.
The shots came from near the assembly hall in the small school, located in Stirlingshire, Scotland.
Murray never imagined the shots were being fired by someone he knew; 43-year-old former scout leader Thomas Hamilton.
In his autobiography Hitting Back, Murray says he attended a youth group run by Hamilton, who the family knew well enough to occasionally drive home.
But that day, Hamilton had on him 743 cartridges of ammunition – and would, over the next three to four minutes, become responsible for the deadliest mass shooting in British history.