This week, filmmaker Debra Kellner brought us the first in a series of short films about the construction of the Simons Observatory. It includes some beautiful drone footage of ACT, POLARBEAR, and the site at which SO will soon be built. There was some debate about whether or not a drone could fly above 17,000 ft — this footage sure seems to settle that! Watch it here: https://www.simonsfoundation.org/features/foundation-news/the-eternal-sky/