GSG9 is not just Germany's national counterterrorist team, but it's considered one of the most elite tactical units in the entire world. Unless you're a high-speed low-drag operator with Delta Force, a trident pinned U.S. Navy SEAL, or a commando on the British SAS, you'll never know anything about them first hand. And, that's exactly where this true story begins, with Jim Wagner, an American with some exceptional skill sets, inside of Grenzschutzgruppe...