John Mace Grunsfeld (born 10 October 1958) is an American physicist and a former NASA astronaut. He is a veteran of five Space Shuttle flights and has...

Gregory used MACE to test about 200 different motion disturbance situations over 45 hours of testing during the mission. Information from MACE was to be...

Daniel T. Barry, Charles Brady, Catherine Coleman, Michael Gernhardt, John Grunsfeld, Wendy Lawrence, Jerry Linenger, Richard Linnehan, Michael Lopez-Alegria...

Guest(s) Introductory phrase Original air date Production code 1,068 TBA John Grunsfeld N/A August 1 8131 Obamacare mandates birth control coverage, Democrats...