Question: The Bell X-1 was an aircraft piloted at a supersonic level by the test pilot who served in what branch of the armed forces?
Sentence (from "Chalmers Goodlin"): Chalmers Hubert Goodlin (January 2, 1923 – October 20, 2005) was the second test pilot of the Bell X-1 supersonic rocket plane, and the first to operate the craft in powered flight (the others having been glide tests).
Relevant evidence: No