1.   About four enemy fighters which took off were promptly shot down.

2.   Antiaircraft fire had become greatly intensified, but in my continued observations I saw no enemy fighter planes.

3.   He was shot down by enemy fighters.

4.   I instructed Peter to keep a sharp lookout for enemy fighters and then to follow me.

5.   No enemy fighters were in the air, nor were there any gun flashes from the ground.

6.   Once again we came under attack from enemy fighter planes.

7.   Only a few, isolated bursts of flak were seen and no enemy fighters were encountered.

8.   The plane was shot down by enemy fighters.

9.   US planes clashed with enemy fighter aircraft again today.

10.   Enemy fighters sniped at them from vacant buildings.