Her husband Denis died in 2003 from pancreatic cancer. She attended Ronald Reagan's funeral service in 2004. In the later years of her life, she suffered from dementia and withdrew from public engagements in 2002. In 2006, Thatcher attended the official Washington memorial service to mark the fifth anniversary of the September 11 attacks on the United States (US). She was a guest of Vice President Dick Cheney, and met Secretary of State Condoleezza Rice during her visit. She would also visit several times for ceremonies that honoured Reagan.