Calling on the international community to take steps to prevent genocide anywhere, UN Secretary-General Ban Ki-moon has suggested establishment of anti-genocide treaties and courts to put "would-be genocidaires" on notice that their crimes would not go unpunished. Preventing genocide is the collective responsibility, Mr. Ban said on the occasion 15th anniversary of 1994 massacre in Rwanda. "Only by meeting this challenge can we match the resolve of the survivors and truly honour the memory of those who died in Rwanda 15 years ago," he said in a message. April 1994 saw the beginning of a slaughter in the tiny East African country in which more than 800,000 ethnic Tutsis and Hutu moderates were killed, mostly by machete, by Hutu extremists in less than 100 days. Two photography exhibits on Rwandan survivors were also launched at the UN Headquarters in New York. An exhibit, entitled 'Visions of Rwanda: Images of Survival, Reconciliation, Forgiveness and Hope', documents the 2007 coming together of 12 survivors, including orphans, widows, rape and assault victims, a judge and perpetrators, some of whom were responsible for the killing of family members of other participants. "The resounding voices of survivors touch us in ways that no other words could," Mr. Ban commented in his message, adding that they also depict a country moving toward reconciliation. "Yet the silence of the more than 800,000 innocent victims still haunts our collective conscience," he said. Mr. Ban also described actions UN has been taking to prevent further atrocities and to secure justice for victims. UN peacekeepers in the Democratic Republic of the Congo, he said, are now mandated to protect civilians threatened by ex-Armed Forces of Rwanda/Interahamwe in the country's east, which includes some of the same people who fled Rwanda after orchestrating the genocide. He added that Francis Deng, his special adviser on the prevention of genocide, is constantly monitoring the world for any signs of a potential genocide, "ready to alert the international community so it can move quickly and decisively in response." Also speaking at ceremony, General Assembly President Miguel DEscoto urged the international community to continue to learn from the Rwandan experience and to explore the roots of ethnic conflict and racism to prevent future tragedies. For that reason, he urged all Member States to support the upcoming Durban Review Conference, which would be "a testament to the resolve or lack of resolve of each and all of us together, at this juncture in history, to combat and eliminate all manifestations of racism, racial discrimination, xenophobia and related intolerance". The meet, to be held in Geneva from April 20 to 24 will assess progress since the landmark 2001 World Conference against Racism, Racial Discrimination, Xenophobia and Related Intolerance, held in South Africa.