The stealth bomber doesn't have a vertical stabilizer, this reduces the radar signature, but also means the design is inherently unstable. It steers by using these little air brakes in the wing tips, open the left one a little and the plane yaws left, etc.. But keeping the plane pointing in the right direction requires more computations and reactions per second than humans are known for possesing. A human trying to steer it manually would undoubtedly tumble out of the sky. But with the help of a computer it does fly.
