Dr. Bryan Laubscher and Eric Westling were the guests for this Space Show program. We began our discussion with a review of the rocket equation and both Eric and Bryan took us through the chemistry and physics of rockets, mass ratios, etc. With extensive questioning by listeners as well as myself, both guests explained why chemical rocket propulsion breakthroughs were unlikely. I urge listeners to pay attention to this discussion. If you disagree, send our guests a note and explain why they are not correct.