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Dorothy Vaughan was an American computer programmer and mathematician who made significant contributions to the early U.S. space program. She was also the first Black American supervisor at NASA, a role she would continue to hold up to and beyond its merger with NASA.
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A former slave, Sojourner Truth became an outspoken advocate for abolition, temperance, and civil and women's rights in the nineteenth century. Her Civil War work earned her an invitation to meet President Abraham Lincoln in 1864.
