French outgoing President Nicolas Sarkozy (2nd L, front) shakes hands with his successor Francois Hollande (3rd L, front) at the Elysee Palace in Paris, France, May 15, 2012. The power handover ceremony between Sarkozy and Francois Hollande was held here Tuesday morning, when Francois Hollande was officially sworn in as France's president. [Xinhua]