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Footage of the chaos after the shooting at Robb Elementary School in Uvalde, Texas where a gunman killed 19 students and two teachers late Tuesday morning at a South Texas elementary school.
A U.S. Border Protection agent, one of several officers responding to the scene, shot and killed the gunman, a senior Department of Homeland Security official told USA TODAY on Tuesday night.
The shooting is the deadliest school shooting in Texas history, and the third deadliest school shooting in modern U.S. history.