The shooting at Robb Elementary School in Uvalde, Texas, a year ago may have altered the conversation surrounding gun violence in the United States. But after 19 4th-grade students and two teachers died in one of the deadliest school shootings in American history, senior homeland security officials say they cannot point to "any dramatic change" in school safety or the threat landscape plaguing educational institutions. Schools still at risk from extremists The Department of Homeland Security (DHS) issued a terror threat bulletin Wednesday warning that schools remain at risk of extremist violence, along with U.S. critical infrastructure, faith-based institutions, the...