@NatReconOfc
Answer: Thanks to all who took a stab at answering our question about the Hexagon's first mission. The correct answer is C. June 15, 1971. Launched aboard a Titan III-D, the Hexagon was as big as a locomotive and carried four film-return buckets.
8:30 AM - 12 Apr 2019
https://twitter.com/NatReconOfc/status/1116725375676166146