The US Department of Justice has named a team to lead its review of the law enforcement response to the bloody siege in Uvalde, Texas, where a gunman killed 19 children and two teachers in adjoining classrooms and stayed there for more than an hour while police waited nearby.
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• Moderna: Updated Covid vaccine booster shows stronger antibody response to Omicron • Opinion: On Covid vaccines, don’t let the perfect be the enemy of the good
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