Complex sentence: The gap only existed in exaggerated estimates made by the Gaither Committee in 1957 and United States Air Force (USAF) in the early 1960s, the CIA provided figures that were much lower and gave the US a clear advantage.
Split into simpler sentences: The gap only existed in exaggerated estimates made by the Gaither Committee in 1957 and United States Air Force (USAF). In the early 1960s, the CIA provided figures that were much lower and gave the US a clear advantage.