In 1939 , he was transferred to the rocket department . During the Second World War , this moved from Woolwich to Fort Halstead , and then to Aberporth in 1940 , where it became the Projectile Development Establishment , with Sir Alwyn Crow as Controller of Projectile Development and William Cook as his deputy . On 17 April 1945 , he was commissioned into the British Army as a second lieutenant on the General List . After the defeat of Germany , he was sent to Germany , and then to the United States as part of the British Scientific Mission to work on the V-1 flying bomb and the V-2 rocket . For his services , he was awarded the U.S. Medal of Freedom
Medal of Freedom
Medal of Freedom (1945)
John Challens