On December 14, 2012, a 20-year-old man walked into Sandy Hook Elementary School in Newtown, Connecticut, and shot 26 people, including 20 children, after also killing his mother in their home.
News of the massacre reverberated across the country, and elicited a tearful reaction from then-President Barack Obama, who described it as the worst day of his presidency.
“‘I’m so, so sad today,” he tweeted on the sixth anniversary in 2018. “Sad for the searing loss, that hurts like hell every Dec 14th for those parents, my friends. And sad that I sent my youngest off to 1st grade this morning, and that I work with people who care more about politics than making sure he comes home safe.”