Question: how is Silbervogel and Walter Dornberger connected?

full_context: Document 1: Arthur Rudolph: Arthur Louis Hugo Rudolph (November 9, 1906 – January 1, 1996) was a German Nazi rocket engineer who was a leader of the effort to develop the V-2 rocket for Nazi Germany. After the war, the United States Government's Office of Strategic Services (OSS) brought him to the U.S. as part of the clandestine Operation Paperclip, where he became one of the main developers of the U.S. space program. He worked within the U.S. Army and NASA, where he managed the development of several systems, including the Pershing missile and the Saturn V Moon rocket. In 1984, the U.S. Government investigated him for war crimes, and he agreed to renounce his United States citizenship and leave the U.S. in return for not being prosecuted.
Document 2: Hans Kammler: Hans Kammler (26 August 1901 – 9 May 1945) was a German civil engineer and SS commander during the Nazi era. He oversaw SS construction projects and towards the end of World War II was put in charge of the V-2 missile and jet programmes. As an SS officer, he was the last person in Nazi Germany to be appointed to the rank of "SS-Obergruppenführer".
Document 3: Silbervogel: Silbervogel, German for silver bird, was a design for a liquid-propellant rocket-powered sub-orbital bomber produced by Eugen Sänger and Irene Bredt in the late 1930s for The Third Reich/Nazi Germany. It is also known as the RaBo ("Raketenbomber" or "rocket bomber"). It was one of a number of designs considered for the "Amerika Bomber" mission, which started out in the spring of 1942 being focused solely on trans-Atlantic range piston-engined strategic bombers, like the Messerschmitt Me 264 and Junkers Ju 390, the only two airframe types actually built and flown for the competition. When Walter Dornberger attempted to create interest in military spaceplanes in the United States after World War II, he chose the more diplomatic term "antipodal bomber".
Document 4: Messerschmitt Me 163 Komet: The Messerschmitt Me 163 Komet was a German rocket-powered fighter aircraft. Designed by Alexander Lippisch, it is the only rocket-powered fighter aircraft ever to have been operational and the first piloted aircraft of any type to exceed 1000 km/h (621 mph) in level flight. Its design was revolutionary and its performance unprecedented. German test pilot Heini Dittmar in early July 1944 reached 1130 km/h , an unofficial flight airspeed record unmatched by turbojet-powered aircraft for almost a decade. Over 300 aircraft were built, but the Komet proved ineffective in its dedicated role as an interceptor aircraft and was responsible for the destruction of only about nine to eighteen Allied aircraft against ten losses. Aside from combat losses many pilots were killed during testing and training.
Document 5: Horten H.XVIII: The Horten H.XVIII was a proposed German World War II intercontinental bomber, designed by the Horten brothers with pioneering features such as a flying wing configuration, turbojet engines and stealth characteristics. The unbuilt H.XVIII represented, in many respects, a scaled-up version of the Horten Ho 229, a prototype jet fighter. The H.XVIII was one of many proposed designs for an "Amerika Bomber", and would have carried sufficient fuel for transatlantic flights.
Document 6: Messerschmitt Me 262: The Messerschmitt Me 262, nicknamed Schwalbe (German: "Swallow") in fighter versions, or Sturmvogel (German: "Storm Bird") in fighter-bomber versions, was the world's first operational jet-powered fighter aircraft. Design work started before World War II began, but problems with engines, metallurgy and top-level interference kept the aircraft from operational status with the Luftwaffe until mid-1944. The Me 262 was faster and more heavily armed than any Allied fighter, including the British jet-powered Gloster Meteor. One of the most advanced aviation designs in operational use during World War II, the Me 262's roles included light bomber, reconnaissance and experimental night fighter versions.
Document 7: Ulrich Walter: Prof. Dr. Ulrich Hans Walter (born February 9, 1954) is a German physicist/engineer and a former DFVLR astronaut.
Document 8: Walter Dornberger: Major-General Dr. Walter Robert Dornberger (6 September 1895 – 27 June 1980) was a German Army artillery officer whose career spanned World War I and World War II. He was a leader of Nazi Germany's V-2 rocket program and other projects at the Peenemünde Army Research Center.
Document 9: Fieseler Fi 166: In the early 1940s, Erich Bachem, Fieseler's Aircraft's technical manager, developed two designs for a rocket-launched fighter that could reach high altitudes quicker than conventional fighters.
Document 10: Operation Lighthouse (1937): Operation Lighthouse was the name given to the failed experimental launch of four Aggregate 3 liquid-fuel rockets by Wernher von Braun and Walter Dornberger on the German island of Greifswalder Oie in December 1937.
Document 11: Hermann Oberth: Hermann Julius Oberth (] ; 25 June 1894 – 28 December 1989) was an Austro-Hungarian-born German physicist and engineer. He is considered one of the founding fathers of rocketry and astronautics, along with the French Robert Esnault-Pelterie, the Russian Konstantin Tsiolkovsky and the American Robert Goddard.
Document 12: Operation Paperclip: Operation Paperclip was a secret program of the Joint Intelligence Objectives Agency (JIOA) in which more than 1,600 German scientists, engineers, and technicians, such as Wernher von Braun and his V-2 rocket team, were recruited in post-Nazi Germany and taken to the U.S. for government employment, at the end of World War II; many were members and some were leaders of the Nazi Party.
Document 13: Messerschmitt Me 263: The Messerschmitt Me 263 "Scholle" (plaice) was a rocket-powered fighter aircraft developed from the Me 163 "Komet" towards the end of World War II. Three prototypes were built but never flown under their own power as the rapidly deteriorating military situation in Germany prevented the completion of the test program.
Document 14: Horten Ho 229: The Horten H.IX, RLM designation Ho 229 (or Gotha Go 229 for extensive re-design work done by Gotha to prepare the aircraft for mass production) was a German prototype fighter/bomber initially designed by Reimar and Walter Horten to be built by Gothaer Waggonfabrik late in World War II. It was the first flying wing to be powered by jet engines.
Document 15: Heinkel He 162: The Heinkel He 162 "Volksjäger (German, "People's Fighter"), the name of a project of the Emergency Fighter Program design competition, was a German single-engine, jet-powered fighter aircraft fielded by the Luftwaffe in World War II. Designed and built quickly, and made primarily of wood as metals were in very short supply and prioritised for other aircraft, the He 162 was nevertheless the fastest of the first generation of Axis and Allied jets. "Volksjäger" was the Reich Air Ministry's official name for the government design program competition won by the He 162 design. Other names given to the plane include "Salamander", which was the codename of its construction program, and Spatz" ("Sparrow"), which was the name given to the plane by Heinkel.
ground_truth: World War II