Dozens of activist groups with a range of missions from eliminating tax havens to boosting money for development are organizing protests this week. A big march is planned for Tuesday in Nice under the slogan “People First, Not Finance.”

The protests are timed around the summit of G20 leaders in nearby Cannes on Thursday and Friday.

More than 12,000 police and other security officers are deployed to maintain order.

The G20 summit is expected to focus on Europe’s efforts to overcome its debt crises, which have threatened the global recovery and rocked financial markets.