The V-1 was the world's first operational cruise missile. Powered by a pulsejet engine that made a distinctive sputtering sound, it was nicknamed the 'Doodlebug' or 'Buzz Bomb' by Londoners. Unlike the supersonic V-2, the V-1 was slow enough to be intercepted by fast fighter planes or anti-aircraft fire. A famous tactic used by RAF pilots was to fly alongside the V-1 and use their wingtip to flip the missile over, disrupting its gyroscope and sending it crashing into open fields. While terrifying, the V-1 was more of a psychological weapon than a strategic one, intended to break British morale during the final years of the war.