Question: Felice Trojani collaborated with Umberto Nobile on which aircraft that was the first to reach the North Pole?
Sentence (from "Umberto Nobile"): He is primarily remembered for designing and piloting the airship "Norge", which may have been the first aircraft to reach the North Pole, and which was indisputably the first to fly across the polar ice cap from Europe to America.
Relevant evidence: Yes