Katherine Coleman Goble Johnson celebrated her 100th birthday this year on August 26th.

An African-American mathematician who worked for NASA and its predecessor for 35 years, she made calculations for US manned spaceflights. Starting with Alan Shepard's suborbital flight, Johnson worked through to the beginning of the Space Shuttle program before her retirement. In 2015 President Obama awarded Johnson the Presidential Medal of Freedom.

Mona Evans
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