Forbes 400 ranking of the richest Americans has Bill Gates on top again, 14 people under the age of 40 and Donald Trump falling to 156 on the list after losing 800million last year

Daily Mail - Science & tech 

The annual Forbes 400 ranking of the richest Americas is out, and for the 23rd consecutive year it is very, very good to be Bill Gates. The Microsoft founder's already massive wealth increased by 5billion over the past year, giving him a net worth of 81billion and putting him well ahead of runner-up Jeff Bezos. The Amazon founder worked his way into the second spot for the first time this year with 67billion, enough to narrowly edge out Warren Buffet of Berkshire Hathaway, who was down one spot with 65.5billion. Also notable are the 14 people under the age of 40 who made their way onto this year's list, with Facebook founder Mark Zuckerberg leading the pack at number four with a net worth of 55.5 billion after making over 15billion in the last year. It was not however a great year for Donald Trump, who dropped to 156 on the list after losing 800million.