1/1
Space_002_072512.JPG
UNITED STATES - JULY 25: Donald Pettit, NASA astronaut, testifies at a Senate Commerce, Science and Transportation committee hearing on "The International Space Station: A Platform for Research, Collaboration, and Discovery." A model of the station is on display at his right. (Photo By Chris Maddaloni/CQ Roll Call)

UNITED STATES - JULY 25: Donald Pettit, NASA astronaut, testifies at a Senate Commerce, Science and Transportation committee hearing on "The International Space Station: A Platform for Research, Collaboration, and Discovery." A model of the station is on display at his right. (Photo By Chris Maddaloni/CQ Roll Call)

Copyright © 2012 CQ Roll Call