Dmitry Medvedev has arrived in Zurich on an historic, first state visit of a Russian president to Switzerland.During his two-day stay, the Russian leader will be discussing the economic crisis, bilateral issues and reform of the G20 consultation process. But security looks likely to top the agenda. At a press conference, President Medvedev expressed concern at the current state of security cooperation in Europe. “The level (of security) has not improved but rather worsened in the last 10 to 15 years, that is the sad fact. We are not separated now into ideological blocs. We do not have different values but, at the same time, the level of security is in free fall,” he said. The two nations are also cementing commercial ties. Russia imports about one billion Swiss francs, that is 650 million euros a year, while Russian exports are estimated at three times that amount.