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ALEXANDRIA, VA - AUGUST 19: (NO U.S. TABLOID SALES) Vice President Gerald Ford and wife Betty in a traditional pose at their home, August 19, 1974 in Alexandria, Virginia. (Photo by David Hume Kennerly/Getty Images)

ALEXANDRIA, VA - AUGUST 19: (NO U.S. TABLOID SALES) Vice President Gerald Ford and wife Betty in a traditional pose at their home, August 19, 1974 in Alexandria, Virginia.  (Photo by David Hume Kennerly/Getty Images)

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BETHESDA, MD. - OCTOBER 2: (NO U.S. TABLOID SALES) President Gerald R. Ford and First Lady Betty Ford hold hands in the President's Suite at Bethesda Naval Hospital, prior to the First Lady's breast cancer surgery on October 2, 1974 in Bethesda, Maryland. (Photo by David Hume Kennerly/Getty Images)

BETHESDA, MD. - OCTOBER 2: (NO U.S. TABLOID SALES) President Gerald R. Ford and First Lady Betty Ford hold hands in the President's Suite at Bethesda Naval Hospital, prior to the First Lady's breast cancer surgery on October 2, 1974 in Bethesda, Maryland. (Photo by David Hume Kennerly/Getty Images)

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President Gerald Ford sits with his daughter Susan on the floor of the White House's Great Hall, watching their pet golden retriever 'Liberty,' Washington, DC, c. 1978. (Photo by Pictorial Parade/Getty Images)

President Gerald Ford sits with his daughter Susan on the floor of the White House's Great Hall, watching their pet golden retriever 'Liberty,' Washington, DC, c. 1978. (Photo by Pictorial Parade/Getty Images)

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CAMP DAVID - AUGUST 7: (NO U.S. TABLOID SALES) President Gerald R. Ford, First Lady Betty Ford and youngest child Susan Ford, take their dog Liberty on a stroll through the walkways in the woods of Camp David on August 7, 1976 in Thurmont, Maryland. The youngest of the Ford children, Susan has been the only child who has lived at the White House for any period of time. (Photo by David Hume Kennerly/Getty Images)

CAMP DAVID  -  AUGUST  7: (NO U.S. TABLOID SALES) President Gerald R. Ford, First Lady Betty Ford and youngest child Susan Ford, take their dog Liberty on a stroll through the walkways in the woods of Camp David on August 7, 1976 in Thurmont, Maryland. The youngest of the Ford children, Susan has been the only child who has lived at the White House for any period of time. (Photo by David Hume Kennerly/Getty Images)

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VAIL, CO - DECEMBER 23: (NO U.S. TABLOID SALES) The Ford family gather for a family Christmas portrait (R-L) son John "Jack" Ford, President Gerald R. Ford, First Lady Betty Ford, daughter Susan Ford with pet dog Liberty and Liberty's puppy Misty, son Steven Ford, son Mike Ford and his wife Gayle Ford on December 23, 1975 during their annual Christmas retreat in Vail, Colorado. (Photo by David Hume Kennerly/Getty Images)

VAIL, CO - DECEMBER 23:  (NO U.S. TABLOID SALES) The Ford family gather for a family Christmas portrait (R-L) son John "Jack" Ford, President Gerald R. Ford, First Lady Betty Ford, daughter Susan Ford with pet dog Liberty and Liberty's puppy Misty, son Steven Ford, son Mike Ford and his wife Gayle Ford on December 23, 1975 during their annual Christmas retreat in Vail, Colorado. (Photo by David Hume Kennerly/Getty Images)