1.   The second alternative system would attack enemy missiles right after launch, instead of in space.

2.   The troops in their bunkers were sitting ducks for enemy missiles.

3.   The laser weapons are designed to zap enemy missiles.

4.   ...a base within range of enemy missiles.

5.   In the midst of it comes unexpecately over the radio the announcement of the President of the United States declaring a state of emergency for suspected enemy missiles approaching.

6.   Repeat.There are no enemy missiles approaching.

7.   The warner system will give pilots advance warning of the firing of enemy missiles or anti-aircraft artillery which use laser guidance or ranging systems.

8.   An actual enemy missile would not make itself such an inviting target.

9.   And he also talked approvingly of systems that would knock out enemy missiles in mid-flight or destroy their warheads after they re-entered the atmosphere.

10.   At issue was a plan of the Johnson administration, and later the Nixon administration, to build a missile system to shield the nation from enemy missiles.