Cities across the U.S. lit up to honor Americans killed by the pandemic, as President-elect Joe Biden led a national mourning during a sunset ceremony in Washington, D.C., on the eve of his inauguration.

The big picture: Standing at the Lincoln Memorial Reflecting Pool, surrounded by 400 lights to commemorate lives lost to COVID-19, Biden said: “To heal, we must remember.” From New York City to Miami, city buildings were illuminated as part of this “national moment of unity,” as the U.S. coronavirus death toll surpassed 400,000.