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UPDATE: Lockdown lifted at Dundee-Crown HS after no credible threat foundAugust 30, 2023 -
UPDATE: Lockdown lifted at Highland Park H.S., 5 students taken into custody, police sayApril 5, 2023 -
20 dead, including students and teachers in shooting at Texas elementary schoolMay 24, 2022 -
Gender reveal party sends Tennessee schools on lockdown fearing active shooterSeptember 3, 2021