Suporters of rights for gays and lesbians worldwide secured a major victory at the United Nations this week. The 192-nation U.N. General Assembly voted to restore a reference to killings due to sexual orientation that had been deleted from a resolution condemning unjustified slayings. The shift came after the United States submitted an amendment to restore the reference, which the General Assembly’s human rights committee removed last month from a resolution on extrajudicial, summary and arbitrary executions that is adopted every two years.