Astronaut (and celebrity dancer?) Buzz Aldrin blogs about why we should continue to fly the Space Shuttle and press forward by evolving it into the next generation spacecraft that we need.
https://www.huffingtonpost.com/buzz-aldrin/why-we-should-keep-flying_b_504324.html
https://www.huffingtonpost.com/buzz-aldrin/why-we-should-keep-flying_b_504324.html