Video shows Uvalde gunman entering school and officers’ retreat before hour-long wait

Seventy-seven minutes of video footage assembled from the massacre at Robb Elementary School in Uvalde, Texas reveals the real-time assault after a gunman violently crashed a truck across the street then entered the school unimpeded, killing 19 children and two teachers, while law enforcement spent a painstaking hour waiting in the hallway as shots can be heard inside a classrrom.