NASA's Solar Dynamics Observatory (SDO) is currently in the 'integration and test' phase of mission development, (i.e. observatory is now complete with the spacecraft bus, propulsion module and instruments), the ground system is being completed and flight software is being tested. Critical systems testing has already begun and environmental testing of he observatory will be conducted in the near future as they continue towards a launch readiness date of December 1, 2008. This series of short videos shows the SDO spacecraft being assembled and tested with narration by the engineers doing the work. It will be updated until SDO is ready for launch.