Space shuttle Discovery Commander Pam Melroy tlaks with NASA Administrator Michael Griffin and his wife, Rebecca Griffin, shortly after Melroy and the crew of STS-120 landed at NASA's Kennedy Space Center in Florida. Discovery landed at 1:02 p.m. EST Wednesday after a mission that included on-orbit construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo credit: NASA/Bill Ingalls