Former first lady of the United States Rosalynn Carter has been diagnosed with dementia, it was announced on Tuesday. The Carter Center, a nonprofit organization founded by former President Jimmy Carter and his wife, disclosed the diagnosis. The former first lady, who is now 93 years old, has been an advocate for mental health and aging issues for decades. She served as the first lady from 1977 to 1981 and was known for her work in promoting mental health and human rights. The news of her diagnosis has sparked an outpouring of support and well wishes from across the country.