After three years, the mystery of who sabotaged the Nord Stream pipelines in September 2022 has, for all intents and purposes, been solved. But unlike the dramatic unmasking during a Scooby-Doo episode or the riveting declaration of "who done it" in front of a dinner party of sweating suspects in a Poirot mystery, the arrest of a former Ukrainian military officer accused of leading a team to sabotage the Nord Stream 1 and Nord Stream 2 pipelines on Sept. 26, 2022, has landed like a cell phone...