This 20 October 2019 video from the USA is called Teenage girl arrested after plot to attack metro Atlanta church.
From the (conservative) Daily Mail in England, 19 November 2018:
White girl, 16, arrested after authorities discover notebook detailing her plans to ‘kill worshipers at a predominately black church in Georgia’
A 16-year-old girl has been arrested after it was revealed she planned to attack Bethel African Methodist Episcopal Church in Gainesville, Georgia
Authorities say the teenager, who is white, planned the attack on the predominately black congregation because of their race
Officers learned of the plan after students notified school officials that the suspect kept details of the plan in a notebook
She is charged with criminal attempt to commit murder.