STS120-S-093 (7 Nov. 2007) --- Standing underneath Space Shuttle Discovery on the Shuttle Landing Facility at NASA's Kennedy Space Center, NASA Administrator Mike Griffin (right) talks with astronaut Pam Melroy (center), STS-120 commander, after the landing of the vehicle. At left is Rebecca Griffin, wife of the administrator. The Discovery crew completed the 15-day STS-120 mission, with an on-time landing at 1:01:16 p.m. (EST). Wheel stop was at 1:02:07 p.m. Mission elapsed time was 15 days, 2 hours, 24 minutes and 2 seconds. The STS-120 crew continued the construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss.