The Marshall Spaceflight Center took Charles Schollenberge and I on a tour of some of their facilities and I recorded each part of the tour. Sometimes the audio is challenging because of background equipment noise and the soft voice or proximity of the speaker. However, you should have no real problems hearing what was being explained to us. While Charles and I experienced this in person, I hope you can see using your mind's eye what we saw, or at least have a good visual idea of what was being shown to us. We started out in the X-Ray Calibration Lab which supports Chandra.