![](http://www.nasa.gov/sites/default/files/thumbnails/image/83hc597.jpg)
In this image from Sept. 5, 1983, Guion “Guy” Bluford checks out the sample pump on the continuous flow electrophoresis system experiment in the middeck of the Earth-orbiting space shuttle Challenger.
from NASA http://www.nasa.gov/image-feature/guy-bluford-the-first-african-american-in-space
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