Guest: Dr. Jim Logan. Topics: Reasons for human spaceflight, human factors issues, biomedical and bioengineering for long term space travel/settlement, space tourism. Dr. Jim Logan returned to The Space Show to discuss several very important topics in this two hour program. Please note that Dr. Logan's comments are his own and in no way was he speaking for NASA, any agency, program, or anyone else. In our first segment, Dr. Logan was asked if he could identify the compelling reason for human spaceflight or if it even mattered with the general public. Dr.