Part 27 of a series reassessing the documentary record behind the 1933 Magenta narrative. TL;DR More than 800,000 volunteers reportedly served in the Ground Observer Corps over its Cold War years, though never all at once. That total includes the people who took calls and plotted sightings at filter centers. Operation Skywatch began July 14, 1952, in 27 states. Round-the-clock watches spread to other areas over the following years. Reporting UFOs was an official secondary duty. A December 195...