If I set Passengers = number of passengers it may carry (def=0) to 5 for a normal tank, I am able to enter it with 5 infantry guys. However they are not able to leave the tank any more… is there any possibility?

Hi, is there any possibility to make the AI build and use: 1. Marine troops including ship yard 2. Air troops (even if the human Player didnt build any air troops? 3. Nuclear weapons? Thank you