(Correction: This story has been updated to distinguish between the Ground Combat Vehicle's average procurement unit cost and the average unit manufacturing cost projected by the Army. The two ranges publicized by the Army -- $13 million and approximately $10 million, respectively -- capture different sets of costs. As such, they are not indicative of a cost increase.) (Editor's note: This story was updated at 1:15 p.m. on Aug. 18 to include more information from the acquisition decision memorandum.)...