Choose single player,imperial training missions.
Fly the 2 player cooperative training mission called "Warhead Interception".
Once you completed it (not very easy! I recommend "easy" setting...), you will receive the message: "Quite a challenge, wasn't it? You can stop now if you wish".
Off course, you do NOT stop now!
Some minutes later you will receive some radio chatter from the station, talking about ordering some pizza. Two minutes later a fleet of star destroyers jump in to deliver the pizza. When the Station guy realizes he forgot his wallet, they launch the Heavy Lifter"Mighty Tug"...