Complex sentence: In 1957, he participated in a historic project that was given to Fifteenth Air Force by the Strategic Air Command headquarters known as "Operation Power Flite", the first around the world non-stop flight by all-jet aircraft.
Split into simpler sentences: In 1957, he participated in a historic project that was given to the Fifteenth Air Force by the Strategic Air Command headquarters. It was known as "Operation Power Flite", the first around the world non-stop flight by all-jet aircraft.