 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. It creates a little bit of wisdom if you pay attention.