Complex sentence: On 10 November 1988, the Air Force brought the F-117A from behind a "black veil" by publicly acknowledging its existence and that the aircraft was based at the Tonopah Test Range Airport in Nevada.
Split into simpler sentences: On 10 November 1988, the Air Force brought the F-117A from behind a "black veil" by publicly acknowledging its existence. The aircraft was based at the Tonopah Test Range in Nevada and that the aircraft was based at the Tonopah Test Range Airport in Nevada.