WASHINGTON, DC - SEPTEMBER 22: Astronaut and commander of the Apollo 11 mission Neil Armstrong (L) shakes hands with astronaut and commander of the Apollo 17 mission Eugene Cernan before they testify... more 
WASHINGTON, DC - SEPTEMBER 22: Astronaut and commander of the Apollo 11 mission Neil Armstrong (L) shakes hands with astronaut and commander of the Apollo 17 mission Eugene Cernan before they testify to the House Science, Space, and Technology Committee about human space flight on Capitol Hill September 22, 2011 in Washington, DC. Armstrong was the first human to walk on the moon and Cernan was the last. Last week NASA unveiled their new heavy-lift rocket system that will put humans into space with a command capsule that is already under development. (Photo by Chip Somodevilla/Getty Images) less 
1 / 30
Getty Images | Photo By Chip Somodevilla / Getty Images
Thu, Sep 22, 2011 12:34 PM EDT