Question: What were all the cities that were attacked during the invasion?
Question: What does Hendricks mean by "lock Russian Central Command out of the system" when preparing the launch? Wasn't the satellite already owned by the billionaire (with the central command in India)?
Chosen answer: The missile launches from a Russian silo. They want to stop them preventing the launch locally.
Question: Did they give John Lithgow's character Alzheimer's disease in remembrance of Charlton Heston?
Chosen answer: No they most certainly did not. That wouldn't remotely be considered a particularly respectful homage! They picked Alzheimers because it's specifically a brain condition, which can then be explored in the movie as a plausible way of explaining the intelligence raising properties of the drug used.
Answer: Most likely, coastal cities or cities near a large body of water.