 This year's first presidential debate is just hours away. It's happening in Atlanta. President Biden and former President Donald Trump have gone head to head on the debate stage before. Of course, that was back in 2020, but a lot has changed. Here to talk more are CBS News campaign reporters Olivia Rinaldi and Aaron Navarro. All right, Aaron, let's begin with you. How has President Biden prepped for this debate? We haven't seen him in a couple of days.