STS-116 was a space shuttle mission that launched on December 9, 2006, aboard the Space Shuttle Discovery. The primary objective was to deliver and install the P6 truss segment to the International Space Station (ISS), which enhanced the station's power and structural capabilities. During the mission, astronauts conducted three spacewalks to complete the installation and perform maintenance tasks. The mission lasted 12 days, with Discovery returning to Earth on December 22, 2006. STS-116 was significant for its contributions to the ongoing assembly and operation of the ISS.