Davos '15: Gates, Soros, Pharrell to tackle crises

Davos in 60 seconds

As it gets started this week, the World Economic Forum is as big as ever.

The juggernaut of a conference in Davos, Switzerland, is projected to include more than 2,500 participants from 140 countries who will meet to "address key issues of global importance," according to organizers, in a small skiing village full of snow, armed guards and international press.

The attendee list for the 45th edition of the event is, as usual, star-studded.

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French President François Hollande, Chinese Premier Li Keqiang, German Chancellor Angela Merkel and Italian Prime Minister Matteo Renzi are some of the 40 heads of state and government coming.

Jack Ma of Alibaba, Mary Barra of General Motors, Satya Nadella of Microsoft and Eric Schmidt of Google are among the more than 1,500 business leaders attending.