The communist enemy, with the “world’s fourth largest military,” has been trundling missiles around and threatening the United States with nuclear obliteration.  Guam, Hawaii, Washington: all, it claims, are targetable.  The coverage in the media has been hair-raising.  The U.S. is rushing an untested missile defense system to Guam, deploying missile-interceptor ships off the South Korean coast, sending “nuclear capable” B-2 Stealth bombers thousands of miles on mock bombing runs,pressuring China, and conducting large-scale war games with its South Korean ally.

I don't think the US missile defense system they are shipping to Guan is untested.  I think the only untested part is the North Korean missiles that they suspect they will be launching.

http://www.lockheedmartin.com/us/products/thaad.html

the colors @:33 are spectacular!