Interior Minister M. Claude Gueant admitted that security at France's nuclear plants is lax after Greenpeace activists scaled the walls of a nuclear plant. Greenpeace activists gained entry to the plant at Nogent-sur-Seine at dawn on December 5 and managed to climb the dome of one of its two reactors "in order to spread the message: 'Safe nuclear does not exist.'" “The aim is to show the vulnerability of French nuclear installations, and how easy it is to get to the heart of a reactor,” said Sophia Majnoni, a Greenpeace nuclear expert.