 CBS News Special Report. Under scrutiny over his mental fitness, President Biden holds an almost hour-long press conference after the NATO summit, saying he has taken three significant and intense neurological exams, and they say he's in good shape. I am not opposed. If my doctors tell me I should have another neurological exam, I'll do it. He says of being older... The only thing age does is help you with... It creates a little bit of wisdom if you pay attention.