A doctor has shared a heartbreaking photo of a Nashville school class listening to her talk - twenty minutes before the mass shooter killed three 9-year-olds.
Paediatric surgeon Britney Grayson left Covenant School in Nashville, US, at around 10:12am on Monday after she talked about her work in Kenya - and even taught the excited children some Swahili words.
However, just twenty minutes later, mass-shooter Audrey Hale, 28, entered the small religious school and killed three children and three adults during the sickening attack.
