Okay, I didn't want to do it, but you guys forced me into it...
[PEDANTIC GEEK]
First, notice that the sign in the lower left has corner of the constuction picture says "AUTHORIZED PERSONNEL ONLY, 1213N IA" IA, as in Iowa.
Also, remember that the famous Utopia Planitia Shipyards on Mars, not only had orbital starbases and drydocks, but also manufacturing facilities and construction yards on the planet's surface. In the ST:TNG episode
Parallels, Cardassians were using the Argus Array to spy on several Federation installations, including the Utopia Planitia Shipyards. At one point, as Geordi is running through the Array's sensor logs, a picture of the shipyards appears showing the major structural components of a
Galaxy-class ship being assembled in a yard on the surface of Mars... See below.
[/PEDANTIC GEEK]
Guh. Now I feel dirty. If you'll excuse me, I'm going to go take a shower.
