What missile silos in Alaska?
The BBC used to have a map of missile shield interceptor and radar bases on many of their articles on the missile shield. Oddly they've since gotten rid of them....
Basically, the United States has a much closer striking range (since Alaska could be readily sent missiles made in the contiguous United States since the state is connected by land to the bulk of the country--Hawaii would have to have the misssiles shipped) to hit the heavily populated areas of China than China would have to hit the heavily populated areas of the United States.