Holocaust Remembrance Day has been marked around the world in memory of the 6 million Jews killed by the Nazis in World War Two.At the former concentration camp of Auschwitz in Poland, thousands of dignitaries and young Jews from around the world gathered for the annual “March of the Living” to the crematorium in nearby Birkenau. The three-kilometre march has been an annual event for more than thirty years. In Israel, the whole nation came to a standstill at 10 am as sirens pierced the morning air to mark two minutes’ silence in remembrance of the dead. Restaurants, bars and other places of public entertainment are closed for the day as a sign of respect. At Yad Vashem in Jerusalem, Israel’s Holocaust memorial, dignitaries gathered for a wreath-laying ceremony led by recently elected prime minister Benyamin Netanyahu. In an opening speech last night, his comments focussed on events earlier on Monday: Netanyahu strongly condemned a controversial anti-Israel speech by the Iranian leader, adding that Holocaust deniers would never be allowed to carry out another genocide against the Jewish people.