KENNEDY SPACE CENTER, FLA. -- STS-120 mission specialist Scott Parazynski (left) touches the nose cone of space shuttle Discovery after its landing. At far right is Pilot George Zamka. The crew is taking part in the traditional walkdown to look at the state of the shuttle after a launch and landing. The Discovery crew completed the 15-day mission STS-120, with an on-time landing at 1:01:16 p.m. Wheel stop was at 1:02:07 p.m. Mission elapsed time was 15 days, 2 hours, 24 minutes and 2 seconds. Mission STS-120 continued the construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo credit: NASA/Kim Shiflett