More recently, after a genocide that cost nearly 800,000 lives in Rwanda in 1994, and the slaughter of Bosnian men and boys at Srebrenica in 1995, many people vowed that such atrocities should never again be allowed to occur. When Slobodan Milošević engaged in large-scale ethnic cleansing in Kosovo in 1999, the United Nations Security Council adopted a resolution recognizing the humanitarian catastrophe, but could not agree on a second resolution to intervene, given the threat of a Russian veto.