Guest:  Open Lines discussion with Dr. David Livingston as host;  Topics:  Multiple discussion topics with both callers and listeners sending us email comments/questions.  Our listener calls were lengthy while providing good discussion commentary.  See the Tags, repeated below, for topics discussed on this program.

Guest:  Dr. Jim Wertz; Topics: Commercial lunar development plan based on the three power points uploaded to the blog for this discussion with Dr. Wertz.  A variety of related topics and challenges to the program were discussed.

Guest:  Dr. Kelly Weinersmith; Topics:  Dr. Weinersmith' s upcoming book on the future of humans in space, space tourism, public and private sector issues and concerns, human factor spaceflight and settlement medical concerns, nuclear concerns, and much more.

Guest:  Open Lines with Dr. Livingston;  Topics:  Multiple callers and email questions from listeners on multiple topics.  We certainly missed hearing from you and learning what was on your mind regarding space. Next time, give us a call.

Guest:  Derek Webber;  Topics:  We discussed lunar commerce and the role of semantics per Mr. Webber's Space Review article from Nov. 16, 2020, "Lunar Commerce: A Question of Semantics."  There is a link to this article on our blog.