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S116-E-07154 (19 Dec. 2006) --- Backdropped by the blackness of space, clouds and Earth's horizon, the International Space Station is seen as it and Space Shuttle Discovery begin their relative separation. Earlier the STS-116 and Expedition 14 crews concluded eight days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 4:10 p.m. (CST) on Dec. 19, 2006. Astronaut William A. (Bill) Oefelein, STS-116 pilot, was at the controls for the fly-around, which gave Discovery's crew a look at its handiwork, a new P5 spacer truss segment and a fully retracted…