When you want to get a fission weapon,or simply nuclear material from point A to point B,sometimes to put it airborn is not the best option.
My buddy used to tell me stories about cops trying to stop the convoy. Nobody was notified about the upcoming movement due to security reasons. The SST WOULD NOT stop. You can imagine the associated "fun" the escourt vechicles and guard's would have considering the movement would have authority over EVERYTHING and EVERYBODY. --- SAWMAN