Dave Shuster has been confronted by secret government agents over a photo taken by a Mars lander of a graveyard complete with crosses on Mars. Shuster claims that - in an alternate timeline - he was a low-level bureaucrat in the administration of a joint U.S. - Soviet Mars colony when he was caught up in a murder mystery involving the illegal use of robot technology.In that timeline, the Cold War took a very different turn - largely influenced by...