Five things you should add, one a prison. When you arrest some one they should go to a prison there is a prison population in the info of the building when you tap on it. There should be four levels of security. Low, med, high, and, max. After the airport update, it got me thinking. Why is there just monorail trains? You should add freight and passenger trains that move on the ground. Next, you should add a plague disaster the kills inhabitants of citizens of the city. You should also make a tsunami disaster and a volcano disaster two. This would make the the game more a realistic simulation. I would highly appreciate if you would do so and add these in the next update or two. Thank you!