Question: how is Silbervogel and Walter Dornberger connected?
Context: Walter Raleigh Gilbert (16 September 1853 – 26 July 1924) was an English amateur cricketer who played first-class cricket for Middlesex and Gloucestershire between 1873 and 1886.  A cousin of W. G. Grace, he played for Gloucestershire when, dominated by the Grace family, it was the leading county.  Gilbert's best season was 1876, when he scored 205 not out for the county, but he was subsequently less successful.  Closely connected with the United South of England Eleven, a professional touring team of which he eventually became secretary, Gilbert was financially affected by a declining interest in such teams.  With insufficient income to continue as an amateur he became a professional in 1886, but played only one match before he was caught stealing from teammates in a minor match, ending his first-class career.  After serving a 28-day prison sentence Gilbert moved to Canada, where he worked for the Land Titles Office in Calgary while remaining a prominent cricketer.  He died aged 70 in 1924, but for nearly 60 years after his death, there seemed to be a conspiracy of silence over his fate. Prometheus is a 1998 film-poem created by English poet and playwright Tony Harrison, starring Walter Sparrow in the role of Prometheus.  The film-poem examines the political and social issues connected to the fall of the working class in England, amidst the more general phenomenon of the collapse of socialism in Eastern Europe, using the myth of Prometheus as a metaphor for the struggles of the working class and the devastation brought on by political conflict and unfettered industrialisation.  It was broadcast on Channel 4 and was also shown at the Locarno Film Festival.  It was used by Harrison to highlight the plight of the workers both in Europe and in Britain.  His film-poem begins at a post-industrialist wasteland in Yorkshire brought upon by the politics of confrontation between the miners and the government of Margaret Thatcher.  It has been described as "the most important artistic reaction to the fall of the British working class" at the end of the twentieth century. Camp Sullivan was a United States Army camp located in Whittier, Alaska from 1943 to 1960.  Constructed out of a need to supply the region with military support during World War II, the area became important again during the Cold War after the Army decided to build the 14-story Hodge Building (now Begich Towers) completed in 1957 contained 150 two and three bedroom apartments plus bachelor efficiency units.  Dependent families and Civil Service employees were moved into this efficient high rise.  The new Whittier School was connected by a tunnel at the base of the west tower so students could go to school in short sleeves on the very worst weather days.  The building, originally was named in honor of Colonel Walter William Hodge Civil.  Engineer.  the CO of 93rd Engineer Regiment on the Alcan Highway.  The other structure, the Buckner Building, had been completed in 1953, and was called the "city under one roof".  Both buildings were at one time the largest buildings in Alaska.  The Begich Building is now a condominium.  Together with the 2-story Whittier Manor, Begich Building houses nearly all of Whittier's residents.  The port remained an active Army facility until 1960. Walter of Coventry (fl.  1290), English monk and chronicler, who was apparently connected with a religious house in the province of York, is known to us only through the historical compilation which bears his name, the "Memoriale fratris Walteri de Coventria". 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. 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. 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". Walter Joseph De Maria (October 1, 1935 – July 25, 2013) was an American artist, sculptor, illustrator and composer, who lived and worked in New York City.  Walter de Maria's artistic practice is connected with Minimal art, Conceptual art, and Land art of the 1960s. Marriott Marquis Washington, DC is a luxury hotel located on Massachusetts Avenue NW, in NW, Washington, D.C., the United States.  The hotel is connected to the Walter E. Washington Convention Center across 9th Street NW via an underground concourse. Albert and Liberal Arts Halls are a set of two historic buildings located on the campus of Davis & Elkins College at Elkins, Randolph County, West Virginia.  The brick Georgian Revival style buildings were built between 1924 and 1926, and planned as a unit of two distinct and separate buildings connected by a graceful stone arcade.  They were designed by noted Charleston architect Walter F. Martens.
Answer: World War II