It is night two of the Democratic National Convention, and a night of ultimate triumph for Joe Biden.After waiting for decades, he's just hours away from formally claiming the party's presidential nomination.Amna Nawaz begins our coverage.Tonight, former Vice President Joe Biden will go from presumptive to official Democratic presidential nominee.We cast 49 votes. But the traditional roll call vote to nominate him,going state by state to announce delegate counts will instead be reimagined for this now all-virtual affair.We must pledge once more to march into the future.Tonight's convention theme is "Leadership Matters" and will feature speakers including former Secretary of State John Kerry,also the party's 2004 nominee, progressive Democratic Congresswoman Alexandria Ocasio-Cortez of New York,former second lady Jill Biden, and two former presidents, Bill Clinton and Jimmy Carter, who, at 95,will be making his first appearance at a nominating convention in eight years.Democrats already began making a case for leadership change when their first ever virtual convention kicked off yesterday.The opening night was a jam-packed two hours of slick, highly produced segments,with a mix of prerecorded and live remarks, emceed by actress Eva Longoria.