In this photo provided by NASA, space shuttle Endeavour and its 747 

In this photo provided by NASA, space shuttle Endeavour and its 747 carrier aircraft soar over the Golden Gate Bridge in San Francisco during the final portion of its tour of California, Friday, Sept. 21, 2012. (AP Photo/NASA, Carla Thomas)
Associated Press
In this photo provided by NASA, space shuttle Endeavour and its 747 carrier aircraft soar over the Golden Gate Bridge in San Francisco during the final portion of its tour of California, Friday, Sept. 21, 2012. (AP Photo/NASA, Carla Thomas)
View Comments