Astronaut Joseph Acaba, who earned his master's degree in geology from UA in 1992, made his first spacewalk today, spending more than six and a half hours outside the space station, with fellow astronaut Steve Swanson. They worked on a truss, installed another GPS antenna, and photographed areas for further work.
Update 3-22-09: the news this morning reported that Mr. Acaba, while suspended in space, with no 'up' or 'down,' inserted a pin upside down, jamming some mechanism.
Having known some members of the space corps, I expect that his compatriots are going to ride him mercilessly about this, with appropriate denigration of geologists in general.