Sirens sounded across Israel on Monday morning, bringing life to a standstill as millions of Israelis observed a moment of silence to honor the memory of the victims of the Holocaust. The two-minute siren at 10 a.m. (0700 GMT) is an annual tradition marking Israel's Holocaust remembrance day, which began Sunday evening and ends at sundown Monday. Pedestrians froze in their tracks, buses stopped on busy streets, and cars on major highways pulled over as the country paused to pay respect to the 6 million Jews killed by the Nazis. The siren also opened an official ceremony at Yad Vashem, the country's official Holocaust memorial and museum. Television stations devoted their broadcasts to historical documentaries and movies, and radio stations played somber music and interviews with survivors.