NASA has a great end-of-year review on their website nasa.gov.  The space agency achieved some great accomplishments in 2008:  A Mars landing with the Phoenix Lander, stunning photographs from other planets in our solar system, major additions to the International Space Station, a joint lunar science mission with India, progressed toward the goal of returning astronauts to the moon, and celebrated two important anniversaries.
NASA celebrated the tenth year in operation of the International Space Station (ISS), and also celebrated their fifty years of operation as the National Aeronautics and Space Administration.  The Apollo lunar program also hit the forty year [...]

This is the most awesome multimedia site I’ve ever seen; it’s dedicated to NASA’s 50th Anniversary, and has animation, video and audio clips of historic moments in the past fifty years of space exploration…
www.nasa.gov/externalflash/50th/main.html
Explore the amazing fifty year history of American’s space program as NASA celebrates it’s 50th Anniversary…
www.nasa.gov/50th/50th_magazine/historyLetter.html
http://history.nasa.gov/
50 Years of NASA History (The Space Agency Press Release:)
NASA’s birth was directly related to the launch of the Sputniks and the ensuing race to demonstrate technological superiority in space. Driven by the competition of the Cold War, on July 29, 1958, President Dwight D. Eisenhower signed the National Aeronautics and Space [...]