11.   Instead of guiding itself to a collision with the incoming mock warhead in midflight, it missed.

12.   It is hoped the kill vehicle will guide itself into a collision with the mock warhead.

13.   It not only demolished a mock warhead but was said to have succeeded in ignoring two inflatable decoys.

14.   Mock warheads were always launched into space from California and interceptor rockets from Kwajalein Atoll in the Pacific Ocean.

15.   Officials said the mock warhead was destroyed, but it was also spin-stabilized.

16.   The first two flight experiments simply gathered sensor data on mock warheads and decoys.

17.   The first two tests studied only sensor accuracy, the interceptors flying nearby to look at mock warheads among decoys.

18.   The interceptor was pre-programmed to find its target and did hit the mock warhead.

19.   The missile carried a mock warhead and a balloon decoy.

20.   The only retained decoys, he said, were spherical, uniform in materials and substantially brighter or dimmer than mock warheads.