NASA Astronaut Michael Lopez-Alegria Works on Constructing the International Space Station

During National Hispanic Heritage Month, we're celebrating the contributions of the brilliant Hispanic women and men of NASA. In this Feb. 2007 photo, astronaut Michael E. Lopez-Alegria, Expedition 14 commander, participates in a 6-hour, 40-minute spacewalk as construction continues on the International Space Station. via NASA http://www.nasa.gov/image-feature/astronaut-michael-lopez-alegria-works-on-constructing-the-international-space-station