Project 10073 Record Card — Kadoka and Clear Lake, South Dakota, 26-27 November 1956

This document is a collection of reports and record cards concerning a series of Unidentified Aerial Phenomena (UAP) sightings in South Dakota between November 25 and November 27, 1956. The primary incident involves a round, multi-colored object observed by multiple witnesses in Kadoka and Clear Lake, South Dakota. Witnesses described the object as being the size of a baseball or grapefruit at arm's length, exhibiting bright, blinking lights, and moving in a non-patterned, rapid fashion over the course of one and a half hours. The object was observed both visually and through 8x40 binoculars. The reports include official Project 10073 record cards, teletype messages between military units such as the 739th ACWron and the Air Technical Intelligence Center (ATIC), and summaries of other sightings in the region, including reports from Pierre and Hot Springs. Military radar at Rapid City reportedly picked up an object on its screen during the period, and interceptors were dispatched. While the official conclusion on the record card identifies the object as the planet Mars, handwritten annotations on the documents suggest alternative theories, including the possibility of a balloon from the Rapid City launch site. The documentation highlights the involvement of the Ground Observer Corps and the systematic reporting process under Air Force Regulation 200-2.