![](https://www.nasa.gov/sites/default/files/thumbnails/image/sts111-306-012_orig.jpg)
In this mage from June 2002, astronaut Franklin R. Chang-Diaz works with a grapple fixture during a spacewalk to perform work on the International Space Station. via NASA http://www.nasa.gov/image-feature/franklin-chang-diaz-performs-a-spacewalk-on-the-sts-111-mission