Hiawatha Brown, Heavy Equipment Operator for United Space Alliance (USA), approaches launch pad 39A at the NASA Kennedy Space Center as he drives the Astrovan carrying the STS-135 crew on Friday July 8, 2011 in Cape Canaveral, Fla. The Astrovan is a modified 1983 Airstream and has been in use to carry crews to the launch pads since 1984. A close look at the odometer shows it has a little more than 26,521 miles at the time of this photo. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. Photo Credit: (NASA/Jerry Ross)

Crowds are seen out the front window of the Astrovan carrying the STS-135 crew as it departs the NASA Kennedy Space Center, Operations and Checkout Building for launch pad 39A, on Friday, July 8, 2011 in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. Photo Credit: (NASA/Jerry Ross)