People kneel outside in Wroclaw's city center during a holy mass at St. Elizabeth's Cathedral April 10, 2010. Poland's President Lech Kaczynski and his wife Maria, Poland's central bank head and the country's military chief, were among 97 people killed when their plane crashed in thick fog on its approach to a Russian airport on Saturday. REUTERS/Petr Josek (POLAND - Tags: DISASTER POLITICS SOCIETY RELIGION)