So with the manual we now understand how air combat works. Its pretty similar to Civ IV but with some great improvements in my opinion. 1) You can only rebase within your range. Probably one of the biggest abuses of air in Civ IV was the ability to rebase air units any where on the planet. Now the position of air bases is much more important. 2) Improved Interception System. The interception system is more dynamic with the ability to cancel interception with your own sweeps or to set up defensive screens of your own. 3) Much better guided missiles. Guided missiles are both cheaper and (much more important) do not require resources. This means that any modern air force is incomplete without some missiles at the ready...just like true modern air forces. I am quite pleased with the changes over all, can't wait to give it a try!