US election: What to watch for in the final Trump-Biden presidential debate

The final presidential debate between President Donald Trump and Democratic presidential nominee Joe Biden on Thursday night is set to tackle the issues of COVID-19, race in America and leadership in America. It also will see a change to the format, with a mute button being used to give each candidate two minutes of uninterrupted time to make their point before they are opened up to cross talk and debate. As Jackson Proskow reports, the final debate comes as national security advisors raise concerns about serious foreign election interference from Russia and Iran.