A big team of dedicated, diverse people is working hard to make LSST a reality. On September 14, 2017, we asked everyone on the LSST team to submit a photo or video taken during the workday. This video compiles the 142 images received, and provides a sense of the breadth of tasks --and talent-- involved in this complex project. This is the third such video created to document LSST's ongoing construction: A Day in the Life of LSST, Part III.