Wernher Magnus Maximilian Freiherr von Braun ; 23 March 1912 – 16 June 1977) was a German American aerospace engineer and space architect. He became a member of the Nazi Party and then the Allgemeine SS to support his rocket work. He led the development of rocket technology in Nazi Germany, and later of rocket and space technology in the US.

As a young man, von Braun worked in Nazi Germany's rocket development program. He helped design and co-developed the V-2 rocket at Peenemünde Army Research Center during World War II. The V-2 became the first artificial object to travel into space by crossing the Kármán line on 20 June 1944. Following the war, he was secretly moved to the United States, along with about 1,600 other German scientists, engineers, and technicians, as part of Operation Paperclip. He worked for the United States Army on an intermediate-range ballistic missile program, and he developed the rockets that launched the United States' first space satellite Explorer 1 in 1958. He worked with Walt Disney on a series of films, which popularized the idea of human space travel in the US and beyond from 1955 to 1957.

In 1960, his group was assimilated into NASA, where he served as director of the newly formed Marshall Space Flight Center and as the chief architect of the Saturn V super heavy-lift launch vehicle that propelled the Apollo spacecraft to the Moon. In 1967, von Braun was inducted into the National Academy of Engineering, and in 1975, he received the National Medal of Science.

Von Braun is seen by some as escaping justice for his awareness of Nazi war crimes due to the Americans' desire to beat the Soviets in the Cold War. the "father of rocket science", or the "father of the American lunar program".

His father, Magnus Freiherr von Braun (1878–1972), was a civil servant and conservative politician; he served as Minister of Agriculture in the federal government during the Weimar Republic. His mother, Emmy von Quistorp (1886–1959), traced her ancestry through both parents to medieval European royalty and was a descendant of Philip III of France, Valdemar I of Denmark, Robert III of Scotland, and Edward III of England. He had an older brother, the West German diplomat Sigismund von Braun, who served as Secretary of State in the Foreign Office in the 1970s, and a younger brother, Magnus von Braun, who was a rocket scientist and later a senior executive with Chrysler. Von Braun learned to play both the cello and the piano at an early age and at one time wanted to become a composer. He took lessons from the composer Paul Hindemith. The few pieces of von Braun's youthful compositions that exist are reminiscent of Hindemith's style. He could play piano pieces of Beethoven and Bach from memory. Beginning in 1925, he attended a boarding school at Ettersburg Castle near Weimar, Free State of Thuringia, where he did not do well in physics and mathematics. There he acquired a copy of Die Rakete zu den Planetenräumen (1923, By Rocket into Planetary Space) by rocket pioneer Hermann Oberth. In 1928, his parents moved him to the Hermann-Lietz-Internat (also a residential school) on the East Frisian North Sea island of Spiekeroog. Space travel had always fascinated him, and from then on he applied himself to physics and mathematics to pursue his interest in rocket engineering.

In 1928 the Raketenrummel or "Rocket Rumble" fad initiated by Fritz von Opel and Max Valier was highly influential on von Braun as a teenage space enthusiast. He was so enthusiastic after seeing one of the public Opel-RAK rocket car demonstrations, that he constructed his own homemade toy rocket car and caused a disruption in a crowded sidewalk by launching the toy wagon, to which he had attached the largest firework rockets he could purchase. He was later taken in for questioning by the local police, then released to his father for disciplinary action. The incident highlighted the young von Braun's determination to "dedicate his life to space travel".

In 1930, von Braun attended the Technische Hochschule Berlin, where he joined the Spaceflight Society (Verein für Raumschiffahrt or VfR), co-founded by Valier, and worked with Willy Ley in his liquid-fueled rocket motor tests in conjunction with others such as Rolf Engel, Rudolf Nebel, Hermann Oberth or Paul Ehmayr. In spring 1932, he graduated with a diploma in mechanical engineering. His early exposure to rocketry convinced him that the exploration of space would require far more than applications of the current engineering technology. Wanting to learn more about physics, chemistry, and astronomy, von Braun entered the Friedrich-Wilhelm University of Berlin for doctoral studies and graduated with a doctorate in physics in 1934.

Von Braun was greatly influenced by Oberth, of whom he said:

According to historian Norman Davies, von Braun was able to pursue a career as a rocket scientist in Germany due to a "curious oversight" in the Treaty of Versailles which did not include rocketry in its list of weapons forbidden to Germany.

Involvement with the Nazi regime

thumb|Von Braun with [[Fritz Todt, who utilized forced labor for major works across occupied Europe. Von Braun is wearing the Nazi party badge on his suit lapel.]]

Nazi Party membership

Von Braun was an opportunist who joined the Nazi Party to continue his work on rockets for Nazi Germany.

Michael J. Neufeld, an author of aerospace history and chief of the Space History Division at the Smithsonian's National Air and Space Museum, wrote that ten years after von Braun obtained his Nazi Party membership, he signed an affidavit for the U.S. Army, though he stated the incorrect year: In a 1952 memoir article he admitted that, at that time, he "fared relatively rather well under totalitarianism". and that he perceived him as "another Napoleon" who was "wholly without scruples, a godless man who thought himself the only god". Overall FBI conclusions point to von Braun's involvement in the Nazi Party to be purely for the advancement of his academic career, or out of fear of imprisonment or execution. In 1940, von Braun joined the SS and was given the rank of Untersturmführer in the Allgemeine-SS and issued membership number 185,068. In 1947, he gave the U.S. War Department this explanation:

When shown a picture of himself standing behind Himmler, von Braun said that he had only worn the SS uniform that one time, but in 2002 a former SS officer at Peenemünde told the BBC that von Braun had regularly worn the SS uniform to official meetings. He began as an Untersturmführer (Second lieutenant) and was promoted three times by Himmler, the last time in June 1943 to SS-Sturmbannführer (Major). Von Braun later stated that these were simply technical promotions received each year regularly by mail.

Work under Nazi regime

In 1932, von Braun received a Bachelor of Science Degree in Mechanical Engineering from Technische Hochschule Berlin, Germany. During a period in 1931, von Braun attended the ETH Zürich in Switzerland. During this time in Switzerland, von Braun assisted Professor Hermann Oberth in writing a book concerning the possibilities of creating and manufacturing liquid-propellant rockets. Shortly after this, von Braun founded his own private rocket development business in Berlin, and through which he made the first rocket fired by gasoline and liquid oxygen.

Von Braun received his doctorate in physics (aerospace engineering) on 27 July 1934, from the University of Berlin for a thesis titled "About Combustion Tests." His doctoral supervisor was Erich Schumann. By the end of 1934, his group had successfully launched two liquid fuel A2 rockets that rose to heights of 2.2 and .

Von Braun continued his guided missile work throughout World War Two, and met with Adolf Hitler on several occasions, being formally decorated by Hitler twice, including being awarded the War Merit Cross.

At the time, Germany was highly interested in American physicist Robert H. Goddard's research. Before 1939, German scientists occasionally contacted Goddard directly with technical questions. Von Braun used Goddard's plans from various journals and incorporated them into the building of the Aggregat (A) series of rockets. The first successful launch of an A-4 took place on 3 October 1942. The A-4 rocket became well known as the V-2. In 1963, von Braun reflected on the history of rocketry, and said of Goddard's work: "His rockets ... may have been rather crude by present-day standards, but they blazed the trail and incorporated many features used in our most modern rockets and space vehicles."

Goddard confirmed his work was used by von Braun in 1944, shortly before the Nazis began firing V-2s at England. A V-2 crashed in Sweden and some parts were sent to an Annapolis lab where Goddard was doing research for the Navy. If this was the so-called Bäckebo Bomb, it had been procured by the British in exchange for Spitfires; Annapolis would have received some parts from them. Goddard is reported to have recognized components he had invented and inferred that his brainchild had been turned into a weapon. Later, von Braun said: "I have very deep and sincere regret for the victims of the V-2 rockets, but there were victims on both sides...A war is a war, and when my country is at war, my duty is to help win that war."

In response to Goddard's statements, von Braun said "at no time in Germany did I or any of my associates ever see a Goddard patent". This was independently confirmed. He wrote that statements that he had lifted Goddard's work were the furthest from the truth, noting that Goddard's paper "A Method of Reaching Extreme Altitudes", which was studied by von Braun and Oberth, lacked the specificity of liquid-fuel experimentation with rockets. It was also confirmed that he was responsible for an estimated 20 patentable innovations related to rocketry, as well as receiving U.S. patents after the war concerning the advancement of rocketry. Documented accounts also stated he provided solutions to a host of aerospace engineering problems in the 1950s and 1960s.

thumb|Schematic of the [[V-2 rocket|A4/V2]]

On 22 December 1942, Adolf Hitler ordered the production of the A-4 as a "vengeance weapon", and the Peenemünde group developed it to target London. Following von Braun's 7 July 1943 presentation of a color movie showing an A-4 taking off, Hitler was so enthusiastic that he personally made von Braun a professor shortly thereafter.

By that time, the British and Soviet intelligence agencies were aware of the rocket program and von Braun's team at Peenemünde, based on the intelligence provided by the Polish underground Home Army. Over the nights of 17–18 August 1943, RAF Bomber Command's Operation Hydra dispatched raids on the Peenemünde camp consisting of 596 aircraft, and dropped 1,800 tons of explosives. The facility was salvaged and most of the engineering team remained unharmed; however, the raids killed von Braun's engine designer Walter Thiel and Chief Engineer Walther, and the rocket program was delayed.

The V-2 became the first artificial object to travel into space by crossing the Kármán line with the vertical launch of MW 18014 on 20 June 1944.

The first combat A-4, renamed the V-2 (Vergeltungswaffe 2 "Retaliation/Vengeance Weapon 2") for propaganda purposes, was launched toward England on 7 September 1944, only 21 months after the project had been officially commissioned. Doug Millard of the Science Museum, London states: