Nation

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Terence Smith visits the Bettmann Archive, one of the world's most renowned private collections of historical photographic and graphic images, and explores the arduous process of preserving delicate historic images.

As America remembers Ronald Reagan, renewed attention is focused on Alzheimer's. Terence Smith discusses Alzheimer's disease and efforts to treat it with Dr. Ron Petersen, director of Alzheimer's Research at the Mayo Clinic and the first physician to diagnose President…

Family members and government officials finalized plans Monday for a week-long series of tributes and services in honor of former Pres. Ronald Reagan, who died Saturday from Alzheimer's-related complications at the age of 93.