Bill and Melinda Gates publish their annual letter

GETTING KILLED in a video game, receiving unfair treatment from a teacher, seeing a relative go to jail: the teenagers taking part in Chicago’s Becoming a Man (BAM) initiative admit to a variety of frustrations, some trivial, some tragic, that can stir their anger. The initiative, which teaches young men how to regulate their emotions, aims to lower crime rates and improve graduation rates. Recently one BAM group invited an unusual guest into their counselling circle: Bill Gates, the second-richest man in the world. So what pushes his buttons?

Mr Gates answers that question in his latest annual letter, written with his wife Melinda, describing the work of the $50bn charitable foundation they oversee. He admits to being “pretty harsh” with his parents as a child and “tough” on people at Microsoft. (“Over the decades I’ve mellowed out on that,” he says.) He also remembers “getting mad” at a meeting when he learned that polio cases were increasing.