1.   A recent poll by the Pew Research Center found that among Americans there is modest support for the missile interceptors.

2.   Clinton noted that crucial elements of the program, like the booster rocket for the missile interceptor, were behind schedule and had yet to be tested.

3.   He cited the failure of the most recent tests, and questions about the ability of the missile interceptors to deal with decoys and countermeasures.

4.   In a January test, a leak of sensor coolant made the missile interceptor miss the target altogether.

5.   Most distressingly, the missile interceptor started tumbling off-course as it streaked toward its test target.

6.   On the ground, radio transmitters would send navigational signals to missile interceptors heading for battle.

7.   Privately, though, some Pentagon officials are questioning the schedule in light of test failures and delays in building a new booster rocket for the missile interceptors.

8.   Russia is widely believed to be working on advanced missile interceptors similar to the Patriot missiles used to shoot down Iraqi Scud missiles fired at Israel and Saudi Arabia.

9.   That rudimentary system, the officials said, might include not only missile interceptors based in Alaska but also lasers and interceptors launched from ships.

10.   The adviser also said officials could more quickly expand the defense to include sea-based missile interceptors.