Image: Great Lakes and Central U.S. viewed from the International Space Station

From the International Space Station, Expedition 42 Commander Barry Wilmore took this photograph of the Great Lakes and central U.S. on Dec. 7, 2014, and posted it to social media.

This week on the station, the Expedition 42 crew has been busy with medical science and spacesuit work while preparing for the arrival of SpaceX's Dragon commercial cargo craft, scheduled to launch on Dec. 16 on a two day trip to the station before it is captured by the Canadarm2 and berthed to the Harmony node.