With a land war in Europe, a Red Sea conflict escalating by the day, and China's naval buildup causing nerves to jangle across Southeast Asia, you might think 2023 would have been a great year to be in the defensive weapons business. For defense contracting giant Lockheed Martin (LMT 0.08%), however, it was rather ho-hum.Reporting fourth-quarter (and therefore full-year) results last week, Lockheed Martin was forced to admit that 2023 sales inched up only 2.4% in comparison to 2022, to $67.6 billion. On pro ...