Bill Gates, former CEO and co-founder of the Microsoft Corporation, arrives for a meeting with German President Frank Walter Steinmeier at the Bellevue Palace in Berlin, Germany, Tuesday, Oct. 16, 2018. (AP Photo/Markus Schreiber)
Bill Gates says he will continue to run the Bill and Melinda Gates Foundation with his former wife Melinda as they have found a 'good new working rhythm'. AP

2021 has been the most difficult year of my life, Bill Gates says