article_snippet: the President term in office from 1981 to 1989.
article_snippet: Scroll down for video .
article_snippet: This image was taken in 1991 in California, just three years before the President was diagnosed with dementia .
article_snippet: Reagan says Reagan saw those signs again in 1986 where Reagan claimed Reagan father could not remember the names of the familiar California canyons Reagan was flying over.
article_snippet: He says He saw those signs again in 1986 where He claimed He father could not remember the names of the familiar California canyons He was flying over.
article_snippet: Reagan Reagan informed the nation in a hand written letter when Reagan was formally diagnosed. '