In 1991, the Ronald Reagan Presidential Library opened. On April 13, 1992, Reagan was assaulted by Richard Springer while accepting an award from the National Association of Broadcasters in Las Vegas, though Reagan was not injured. Reagan also addressed the 1992 Republican National Convention, and spoke publicly in favor of the Brady Bill, a constitutional amendment requiring a balanced budget, and the repeal of the 22nd Amendment. His final public speech occurred on February 3, 1994, during a tribute to him in Washington, D.C.; his last major public appearance was at the funeral of Richard Nixon on April 27, 1994. In August 1994, Reagan was diagnosed with Alzheimer's disease, which he announced through a handwritten letter in November. There was speculation over how long he had demonstrated symptoms of mental degeneration, but lay observations that he suffered from Alzheimer's while still in office have been widely refuted by medical experts; his doctors said that he first began exhibiting overt symptoms of the illness in late 1992 or 1993. Over time, the disease destroyed Reagan's mental capacity, leaving him able to recognize only a few people including his wife. Still, he continued to walk through parks and on beaches, playing golf, and until 1999, go to his office in nearby Century City. Eventually, his family decided that he would live in quiet semi-isolation with his wife, who became a stem-cell research advocate, believing that it could lead to a cure for Alzheimer's. Reagan died of pneumonia, complicated by Alzheimer's, at his home in Los Angeles, on June 5, 2004. President George W. Bush called Reagan's death "a sad hour in the life of America". His public funeral was held in the Washington National Cathedral, where eulogies were given by Margaret Thatcher, Brian Mulroney, George H. W. Bush, and George W. Bush. Other world leaders attended including Mikhail Gorbachev. Reagan, then the longest-lived American president at 93 years and 120 days, was interred at his library. Legacy Historical reputation As British historian M. J. Heale summarized, historians have reached a broad consensus that Reagan rehabilitated conservatism, turned the nation to the right, practiced a considerably pragmatic conservatism that balanced ideology and the constraints of politics, revived faith in the presidency and American exceptionalism, and contributed to victory in the Cold War, which ended with the Soviet Union's dissolution in 1991. Many conservative and liberal scholars agree that Reagan has been the most