[Jedi Master Pikachu]

The missile defense shield. (Those are used for interceptors to shoot down enemy missiles, but could probably also be equipped to launch missiles at China). At Fort Greely. If not at Fort Greely, there probably would have been some missile silo in Alaska to easily strike at the Soviet Union during the Cold War.

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.

[GATOR NAVY]

...but could probably also be equipped to launch missiles at China.

Yeah, I know about the interceptors at Ft. Greely, but I think you're a little optimistic in your assumption that any missile can be put into any silo.