What nation or nations has the missile shield?

Question

What nation or nations has the missile shield?

Answer 1

The US, Canada and NATO Countries in Europe will be protected by missile defence systems when they eventually become operational. The US, Japan and Australia are also developing a joint missile defence system for the far east and pacific regions.

http://www.atimes.com/atimes/Japan/EI12D...

http://news.bbc.co.uk/1/hi/world/asia-pa...

Other powerful nations such as Russia and China will most probably be working on such systems in secret.

http://www.ft.com/cms/s/0/61abdad0-4cf3-...