President Biden on Thursday signed into law the Juneteenth National Independence Day Act, turning the oldest celebration of the abolition of slavery in the U.S. into the country’s newest national holiday. “Great nations don’t ignore their most painful moments … they embrace them. Great nations don’t walk away, they come to terms with the mistakes they’ve made. In remembering those moments, we begin to heal and grow stronger,” Biden said at a signing ceremony at the White House attended by Vice President Harris, members of the Congressional Black Caucus and other lawmakers. “The truth is, it’s simply not enough to...