At least 8 Missouri school districts cancel summer school classes after mass shooting threat

At least eight school districts in the Kansas City, Missouri, area have canceled summer school activities on Wednesday after a local police department said it learned of a shooting threat, as communities across the US remain on edge following a series of high-profile mass shootings.At least eight school districts in the Kansas City, Missouri, area have canceled summer school activities on Wednesday after a local police department said it learned of a shooting threat, as communities across the US remain on edge following a series of high-profile mass shootings.