On eve of 9/11 anniversary, Biden tells Americans 'unity is our greatest strength'

President Joe Biden paid tribute to the victims of the Sep. 11 terror attacks Friday, commemorating their lives and the losses of their families in a somber six-and-a-half-minute video.

Biden, in prerecorded remarks to the nation on the eve of the 20th anniversary, hailed the shared sense of national purpose that Americans felt after 9/11, and called unity the "greatest strength" of the country.

"Unity is what makes us who we are, America at its best. To me that's the central lesson of Sept. 11," he said. "Unity doesn't mean...