 Live from NPR News in Culver City, California, I'm Dwayne Brown. For the first time in four years, President Biden and his Republican rival Donald Trump will meet on the debate stage tonight. The 81-year-old Democratic incumbent has the opportunity to reassure voters he's capable of guiding the country through a second term, while 78-year-old Trump could use the moment to move past his recent felony conviction. Here's NPR's Windsor Johnston.