Today is the day that Trump’s four years in office comes to an end and a new president will be sworn in. After his inauguration today, Joe Biden will take on the responsibilities of being Commander-in-Chief – as well as the rewards, some of which will continue for life. As POTUS, Biden will earn a $400,000 (£295,746) salary, along with having access to a $50,000 (£36,616) annual expense...