STS-120 (October 23 – November 7, 2007) was a 6.25 million mile Space Shuttle mission to the International Space Station (ISS). It delivered the "Harmony" module, and reconfigured the P6 truss in preparation for future assembly missions. STS-120 carried a new Expedition 16 crew member, Daniel Tani, and returned Expedition 15 and Expedition 16 crewmember Clayton Anderson. The crew conducted four spacewalks and performed a previously untested repair method on the station's solar array. The mission was accomplished in 15 days, 2 hours, 23 minutes, during 238 orbits.