While a motive in the Annunciation School mass shooting remains under investigation, Alex Perez has the new video showing the chaos inside the church as gunfire erupted during Mass and the father of the 8-year-old killed in the attack speaks out; Mary Bruce has the latest on the dozens of workers who walked out and the four top officials that resigned in protest at the Centers for Disease Control and Prevention following the ousting of the agency's director; Victor Oquendo has details on the horrific alligator attack in New Orleans that police say has left a missing 12-year-old boy dead; and more on tonight's broadcast of World News Tonight. 

Faith Abubey has the latest on the deadly mid-air crash amid a flash flood threat disrupting travel in major hubs across the country, the delays come as officials in California say they've rescued hundreds after an urgent rip current warning, our weather team with your holiday forecast; The potential legal limbo for hundreds of unaccompanied Guatemalan children after a judge halted the Trump administration from trying to deport them, Selina Wang with the new details; Jaclyn Lee reports on the Minneapolis community healing and praying together at the first mass since the deadly attack; Dramatic and terrifying new video of a young boy walking high up on a monorail track at famed Hershey Park, Perry Russom with the latest; An urgent investigation at the "Burning Man Festival" after a death was ruled as a possible homicide; and more on tonight's broadcast of World News Tonight.