http://www.cnn.com/2006/WORLD/asiapcf/06/20/nkorea.missile.reut/index.html"The U.S. defense official, speaking on condition of anonymity, confirmed a Washington Times report that the Pentagon has activated its missile defense system, which has been in the developmental stage for years.
"It's good to be ready," the official said."
Range of the missle:
http://www.fas.org/nuke/guide/dprk/missile/td-2.htm
The range is a guess.