Question: Who trained as a test pilot in the United States, Roberto Vittori or Philippe Perrin?
Sentence (from "Kenneth O. Chilstrom"): He was the first USAF pilot to fly the XP-86 Sabre, chief of fighter test at Wright Field, commandant of the U.S. Air Force Test Pilot School, and program manager for the XF-108 Rapier.
Relevant evidence: No