Complex sentence: The system operates by rotating the vehicle's twin tail booms upward about the trailing edge of the wing by around 65 deg; following reentry, the actuators rotate the booms down into the flush position for approach and landing.
Split into simpler sentences: The system operates by rotating the vehicle's twin tail booms upward about the trailing edge of the wing by around 65 deg. Following reentry, the actuators rotate the booms down into the flush position for approach and landing.