1.   It also plans to attempt to shoot down an intercontinental ballistic missile with a prototype interceptor rocket next month.

2.   Deputy Defense Secretary Paul Wolfowitz told Congress last month that the Pentagon hoped to have four prototype anti-missile rockets stationed in Alaska in two years.

3.   In two of three interception tests, prototype interceptor rockets failed to hit their target in space.

4.   The military has built and tested prototype interceptor rockets for the ground-based system since the first estimate.

5.   The U.S. military planned to test a prototype anti-missile rocket over the Pacific on Friday and crash it into a dummy missile fired from Hawaii.

6.   Wolfowitz told the U.S. Congress last month that the Pentagon hoped to have four prototype anti-missile rockets stationed in Alaska in two years.