JERUSALEM — The specter of Iran hovered over the start of Israel's annual memorial day for the 6 million Jews killed by Nazis in the Holocaust of World War II, as Israeli leaders warned of an Iranian nuclear program they believe is aimed at weapons production.
Israeli Prime Minister Benjamin Netanyahu complained bitterly about international reaction to what he called Iran's drive toward nuclear bombs and its intention to destroy Israel, but he did not hint at a possible Israeli response.
"We encounter in the best case a limp reaction, and even that is fading," Netanyahu said Sunday. "We do not hear the necessary rejection, no harsh denunciation, no outcry."
Netanyahu spoke at Yad Vashem in Jerusalem, Israel's official Holocaust memorial authority, before hundreds of Holocaust survivors and their families, Israeli leaders, diplomats and others. A military honor guard stood at one side of the podium and a girls' choir on the other.
"If we have learned anything from the Holocaust," Netanyahu said, "it is that we must not be silent or be deterred in the face of evil."
In his address at the ceremony, President Shimon Peres recalled visiting the village in Poland where he was born. "Of all the Jewish homes and synagogues, not a single beam remains," he said.
Turning to the present, the Nobel Peace Prize laureate urged the world to confront threats of genocide, singling out Iran's nuclear program. Israel dismisses Iranian claims that it is not making nuclear bombs.
Peres said, "Weapons of mass destruction in the hands of those capable of mass destruction, with voices encouraging that destruction — that is the most perilous combination to world peace."
The day is one of the most solemn on Israel's calendar. Restaurants, cafes and places of entertainment closed down across Israel Sunday evening at the start of the annual remembrance day. Local TV channels scrapped their light entertainment and substituted documentaries about the Holocaust and other similarly serious programming. Radio networks aired interviews with survivors and panel discussions about the significance of the genocide and lessons for the future.
A study released hours before the opening ceremony found that anti-Semitic incidents doubled worldwide last year compared with 2008. Researchers counted 1,129 incidents, more than double the year before and the highest in two decades of studies.