CAPE CANAVERAL, FL - JANUARY 31: Space shuttle Discovery rolls to the launch pad after emerging from NASA's vehicle assembly building atop a crawler transporter at Kennedy Space Center on January 31,... more 
CAPE CANAVERAL, FL - JANUARY 31: Space shuttle Discovery rolls to the launch pad after emerging from NASA's vehicle assembly building atop a crawler transporter at Kennedy Space Center on January 31, 2011 in Cape Canaveral, Florida. Discovery is making the 3.4-mile journey to the launch pad in preparation for it's final mission, scheduled for February 24. (Photo by Joe Raedle/Getty Images) less 
1 / 30
Getty Images | Photo By Joe Raedle / Getty Images
Tue, Feb 1, 2011 11:48 AM EST