Guests: Dr. Madhu Thangavelu; Tihomir Dimitrov (Tisho); Topics: ISU Summer Session, Planetary Defense, the Moon Studio Class. 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.