The United States flew its last official space shuttle mission in 2011, but this year Americans got to say goodbye to the spacecraft in the venerable program's fleet. Throughout the year, NASA delivered the remaining shuttles to final resting places around the country. People turned out in droves to catch a glimpse of the shuttles as they did flyovers en route to their final destinations.
But as the federal manned space program came to an end, the private sector stepped in to take over. In May, Space Exploration Technologies -- or SpaceX -- made a successful demonstration flight to … Read more