Age isn't just a number when you are the US president, the most powerful person in the world. Apart from the experience that comes with the number, age can be weaponised against you.
That's exactly what Joe Biden is experiencing.
In the middle of the APEC meeting last week, US President Joe Biden got up from his chair, walked, as if in a daze, towards Chinese President Xi Jinping and shook his hands. Xi was visibly stunned.
That wasn't the only part where Biden went off the script during Xi's visit, his first to the United States in six years.