When various former (and future) presidents gathered to open the George Herbert Walker Bush Library in Texas in 1997, George W. Bush delivered a speech in which he called his father someone who "left office with his integrity intact," a remark many saw as aimed at Bill Clinton. When Bush later came and stayed in the White House while Clinton was still president, aides told Clinton how uncomfortable he seemed. "What's he supposed to do, like me?" Clinton replied. "I defeated his father." When Bush won the presidency, things changed drastically – they seemed to get along fine from the moment Bush arrived at the White House to talk with Clinton. The two disagreed briefly after 9/11 when Clinton said that he told Bush al-Qaeda would be his biggest threat, while Bush said he didn't remember any mention of the terrorist group, but relations were patched up again in later years.