Apollo 17 Ron Evans conducts a guidance and navigation exercise in mission simulator.
NASA
1972-08-16
<a rel="nofollow" class="external free" href="http://www.hq.nasa.gov/alsj/a17/ap17-KSC-72PC-503BW.jpg">http://www.hq.nasa.gov/alsj/a17/ap17-KSC-72PC-503BW.jpg</a>