Four Falcon 9 first stages and two second stages under construction in SpaceX headquarters, Hawthorne, CA. Spanning nearly 1 million square feet, the SpaceX factory currently produces more rocket engines than any other U.S. manufacturer, and will eventually produce 40 rocket cores annually. <a rel="nofollow" class="external free" href="https://www.youtube.com/watch?v=vrR31nHCV-U">https://www.youtube.com/watch?v=vrR31nHCV-U</a>
SpaceX
Taken on 8 March 2013
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