Top doc explains why Biden's 'older brain' is causing problems - but it's not what you think
![Top doc explains why Biden's 'older brain' is causing problems - but it's not what you think](https://i2-prod.mirror.co.uk/incoming/article33230786.ece/ALTERNATES/s615/1_US-NATO-SUMMIT-DIPLOMACY-BIDEN.jpg)
EXCLUSIVE: President Joe Biden has made headlines with his embarrassing gaffes including calling people the wrong name and appearing confused as he leaves stages