Description: Six years ago, long before he took command of the Starship Excalibur, a young Starfleet officer named Mackenzie Calhoun served as first officer aboard the USS Grissom. Then disaster struck, and Calhoun took the blame. A court-martial led to his own angry resignation from Starfleet … or so it appeared. At long last Captain Calhoun reveals the true story behind the greatest tragedy of his life.