Costs, logistics and celebrity moments

It's where world leaders rub shoulders with billionaires while former footballers clink champagne flutes with film stars and tech bros.

President Trump is the star turn at the Swiss ski resort of Davos for the annual World Economic Forum. But what exactly is the World Economic Forum? And what's the purpose of this glittering get-together of the global elite?

Gareth Barlow speaks to Sky's business and economics correspondent Paul Kelso from the heart of the action in Davos.

Producers: Tom Gillespie & Natalie Ktena

Editor: Mike Bovill