Why do business leaders go to Davos?

There is an urgent and gloomy tone to this year's gathering of the world's richest and most powerful people at the World Economic Forum in Davos.

More than 2,600 delegates are attending the conference and they will be asking each other if capitalism is really the answer to the world's problems.

It is a big question, so why are so many business leaders keen to attend the event?

The BBC's Business Editor Robert Peston explains that "it's not only about saving the world, it's also about the money".