President Biden's age has become a major concern for voters, and it's not just Republicans now who are pointing it out. While many in his party remain are trying to cover it up, some high-profile slip-ups have caused concern about his ability to govern. In this episode of America Uncovered, we look at some examples of why people are concerned, what the Hur report on classified documents found at his home said about his mental state, and Biden's refusal to prove his mental fitness.