Complex sentence: In a newspaper interview published in November 1943, Newton said that he expected to complete a tour (usually 30 sorties) by Christmas, and mentioned that his usual crew had all been killed, while flying with another pilot.
Split into simpler sentences: In a newspaper interview published in November 1943, Newton said that he expected to complete a tour (usually 30 sorties) by Christmas. He also mentioned that the other members of his original crew had been killed, while flying with another pilot.