Department of Public Safety Director Col. Steven McCraw said last week that the first 1,000-foot-long chain will be installed July 7 near Eagle Pass, Texas.
Texas installing buoy barriers to prevent illegal river crossings from Mexico
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McCraw said police had enough officers and firepower on the scene of the Uvalde school massacre to have stopped the gunman three minutes after he entered the building, and they would have found the door to the classroom where he was holed up unlocked if they had bothered to check it.
New report details missed chances to stop Uvalde shooting
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