Guest: Open Lines with Dr. David Livingston. Topics: asteroid mining, Planetary Resources, Inc. SLS. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We welcomed an Open Lines discussion inviting calls and emails on all space related topics. As it turned out, two topics were primary during the program and as a result of that, I will not summarize this program by segment as I usually do. First, the asteroid mining venture as put forth in the press conference for Planetary Resources, Inc. was primary throughout the program. The second commanding topic was the SLS and Op-Ed in the Houston Chronicle on April 20, 2012 by the JSC former director, Chris Kraft & Tom Moser. You can read the article at www.chron.com/opinion/outlook/article/Space-Launch-System-is-a-threat-to.... You can read more about this Op-Ed on Space News at www.spacenews.com/commentaries/120423-fromwires-sls-threat-jsc-jobs.html. Many of the callers throughout the discussion commented on the Op Ed, the SLS, and its future. We also talked about the need for heavy lift, having a specific mission or missions for a rocket, destinations, and a time line for milestone accomplishment. Our first caller was Charles in Las Vegas who commented that he thought Planetary Resources was more "sizzle than steak." Charles was not supportive of a business model relying on secondary payloads. Instead, he said the company had to control its own launch needs. During our three segments, many listeners said they did not agree with Charles, including me. Many of us thought it was possible to use secondary payloads and during our 105 minute program, we covered this subject with the benefits and risks of relying on others, on sole source providers, etc. As for the Op Ed, we talked about it at length, wondered about the NASA lunar study mentioned by Mr. Kraft as well as the existing rockets that could do HSF to the Moon or beyond LEO. The consensus for those calling tonight's show was that SLS in its present format using the current management program will probably be cancelled in 2013 or 2014 despite the support Congress appears to be giving it at this time. Mixed in with the SLS calls, we did talk about the new launch date for the Falcon 9, there was lots of interest in asteroid mining and new technology development to make it happen, plus a few other topics that brought to the listeners attention. When we came back from the final break which was at the 90 minute point, I used the remaining time to highlight some of the special upcoming Space Show programs for the rest of this month into early summer. Please post your comments/questions on The Space Show blog. If you want to email any of the callers or those sending in email questions for this program, send your note to me and I will forward it to you.