A security operation is under way in a Swiss ski resort as politicians and business leaders meet for the World Economic Forum.
Anti-capitalist demonstrators have threatened violence at the annual meeting held over six days in Davos.
Palestinian leader Yasser Arafat and US billionaire businessman Bill Gates are among those due to attend some of the 315 sessions planned.
The impact of a projected slowdown in the US economy and internet technology are among the issues to be tackled.
The forum, in its 31st year, will be looking at how to ensure parts of the world are not left behind and the future of e-commerce following the collapse of some dot.com companies.
The summit will also play host to Balkan leaders hoping to sketch a new economic map, including the possible creation of a customs union.
With its motto of "committed to improving the state of the world," the forum sees itself as a chance for the world's decision makers to get together in a relaxed atmosphere - with a break for skiing.
However, to the 1,000 protesters hoping to disrupt proceedings, the summit is a symbol of all that is worst about globalisation including worldwide markets and the increasing importance of international trade.
Swiss police have called in reinforcements from across Switzerland and Liechtenstein and drafted in 600 soldiers.
Meanwhile, in an advice booklet, the protesters suggest demonstrators carry gas masks and items they may need if they are arrested. It advises against bringing contact lenses and the liquid solutions they require as "You can be arrested for carrying chemical agents."