German V-2 on right and V-1 on lower left, Imperial War Museum

The V-2 was the world's first long-range guided ballistic missile. The missile with liquid-propellant rocket engine was developed during the Second World War in Germany as a "vengeance weapon", designed to attack Allied cities as retaliation for the Allied bombings against German cities. The V-2 rocket was also the first man-made object to cross the boundary of space.

Beginning in September 1944, over 3,000 V-2s were launched by the German Wehrmacht against Allied targets during the war, firstly London and later Antwerp and Liège. According to a 2011 BBC documentary, the attacks resulted in the deaths of an estimated 9,000 civilians and military personnel, while 12,000 forced laborers and concentration camp prisoners were killed producing the weapons.

Photo 122, London, May 2015