Congratulations to Yiannis Raftopoulos for being the first to correctly identify that our second satellite puzzler was a view of Dudinka, a port city along the Yenisei River in northern Siberia. Raftopoulos submitted his answer just 15 hours and 51 minutes after we posted the image—not quite as fast as Alexandre Manthieu was at solving our first puzzler, but still quicker than we had expected given that the image came from a declassified GAMBIT spy satellite and was taken 46 years ago this week. We also received insightful comments from Mark H. (who deduced it was the Arctic, based on the shape of the lakes) and from Anthony Williams (who realized it wasn’t the United States due to the existence of a lone soccer field). Thanks to all who participated. We’ll post a complete caption as our Image of the Day on July 20, 2012. And look for a new puzzler in August.