31.   The new fighter must be able to fly at supersonic speed.

32.   The Lewinsky story then travelled with supersonic speed.

33.   The massive bomber, operated by a four-person crew, can fly at both supersonic speeds at high altitude, and low-level attacks at treetop level.

34.   The neural net managed to keep disabled planes under control even at supersonic speeds.

35.   The scale by which supersonic speeds are measured is named for him.

36.   The threat of foreign attack and the need for jet interceptor aircraft that could achieve supersonic speed was still a novelty to many.

37.   There are many new, intricate moves performed at supersonic speeds.

38.   There Gilruth led research using rockets to test the dynamics of vehicles at supersonic speeds.

39.   They have replaced the needle with a flashlight-size tube that uses a jet of helium to accelerate powdered drugs to supersonic speeds.

40.   Thrust is what pushes the engine and plane to supersonic speed.