I'm all for increasing nuke defenses. Maybe leave the VDS as is and set up a new Project called Star Wars or some other stupid name, with one of the requirements being (beside the usual resources and cash) The Missile Launch Pad and VDS. At this point, the defender would be able to select using Star Wars (which would require the use of a missile from the defenders inventory) and give say a 50-75% of successfully shooting down the incoming nuke. Obviously this would be for high level nations since they would be able to have enough Project slots available. If the defending nation selects to use Star Wars and runs out of missiles during the war, or doesn't have any to start with, then they are stuck with only the VDS. Just some thoughts......or just buff up VDS to 33% like Pre said.