21.   The enemy planes had turned around.

22.   The Gunairstructor, as it was called, helped teach pilots how to shoot down enemy planes.

23.   The number of enemy planes destroyed in the first wave was twice as high as anticipated.

24.   The pair made it into the air and shot down seven enemy planes before running out of ammunition.

25.   Three enemy planes were heading toward the city.

26.   Pilots who down at least five enemy planes are considered aces.

27.   A projection screen in the cab displayed an enemy plane.

28.   In a sense, the aftermath of war is just as shattering as the bombs dropped by enemy planes on the crowded Changi harbour.

29.   In the early days of World War II, the Nazis boasted no enemy plane would ever reach German soil.

30.   Iraq claimed Saturday that its air defense units had struck an enemy plane patrolling in the southern no-fly zone earlier in the day.