Guest:  Leonard David;  Topics:  Leonard brought up multiple space news stories for discussion on this show, plus we looked ahead to 2022 for what would likely be a continuing news story or a breakthrough story.

Guest:  Leonard David; topics:  Mars Sample Return, SETI news & expectations, Artemis Accords, space as a global commons, China space program and lunar goals, US space policy, Space Force and more.

Guest:  Leonard David followed by Open Lines.  Topics:  Leonard's new book "Moon Rush, policy and budget challenges for returning to the Moon, presidential candidates and space policy, Navy-Air Force UFO policy reporting changes and more.

Guest:  Dr. Gil Levin;  Topics: Martian life detection experiments, Independent Mars review panel, Viking Labeled Release experiment, NASA Mars life detection politics and more.  Please direct all comments and questions regarding specific Space Show programs & guest(s) to the Space Show blog which is part of archived program on our website, www.thespaceshow.com.   Comments and questions should be relevant to the specific Space Show program.

Guests: Kathy Lueders; Dr. Heidi Fearn; Topics: First segment: NASA Commercial Crew. Second segment, Dr. Heidi Fearn re Mach Thrusters. Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com. Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use.