and other facilities for German military aircraft. On 9 May 1940, the first bombers took off to attack France. From August to November 1944, a concentration camp was established in Walldorf, close to the airport site, where Jewish female prisoners were forced to work for the airport. The Allies of World War II destroyed the runway system with airstrikes in 1944, and the Wehrmacht blew up buildings and fuel depots in 1945, shortly before the US Army took control of the airport on 25 March 1945. After the German Instrument of Surrender, the war in Europe ended and the US Army started to build a new temporary runway at Frankfurt Airport. The southern part of the airport ground was occupied to build the Rhein-Main Air Base as an Air Force Base for the United States Air Forces in Europe. Berlin Airlift In 1948, the Soviet Union blocked the Western Allies' rail and road access to the sectors of West Berlin under Allied control. Their aim was to force the western powers to allow the Soviet zone to start supplying Berlin with food and fuel, thereby giving the Soviets practical control over the entire city. In response, the Western Allies organised the Berlin Airlift to carry supplies via air to the people in West Berlin. The airports in Frankfurt, Hamburg and Hannover were the primary bases for Allied aircraft. The heavy use of these so-called "Raisin Bombers" caused damage to the runway in Frankfurt and forced the US Army to build a second parallel runway. The airlift ended in September 1949 after the Soviet Union ended their blockade. Growth of the airport In 1951, restrictions for German air travellers were lifted and civil air traffic started to grow again. In 1952, Frankfurt Airport handled more than 400,000 passengers; a year later it was more than half a million. About 100 to 120 aeroplanes took off from and landed in Frankfurt daily. In 1955, Lufthansa resumed flights to and from Frankfurt and in the same year the Federal Republic of Germany gained its air sovereignty back from the Allies. In 1957, the northern runway was extended, first to and then to , to make it compatible with jet aircraft. The airport did not emerge as a major international airline hub until 1958 when a new passenger terminal called Empfangsanlage Ost (Terminal East, literally "Arrival Facility East") opened in the north-east corner of