A Justice Department investigation released on Thursday found that a near-total breakdown in policing protocols hindered the response to the 2022 school shooting in Uvalde‚ Texas‚ that left 21 people dead — but the gravest error was the reluctance of officials to confront the killer during the first few minutes of the attack. The department blamed “cascading failures of leadership‚ decision-making‚ tactics‚ policy and training” for the delayed and passive law enforcement response that...