USS "Shenandoah" was the first of four United States Navy rigid airships.
 It was constructed during 1922–23 at Lakehurst Naval Air Station, and first flew in September 1923.
 It developed the U.S. Navy's experience with rigid airships, and made the first crossing of North America by airship.
 On the 57th flight, "Shenandoah " was torn apart in a squall line over Ohio in September 1925.
Karl-Friedrich Höcker (11 December 1911 – 30 January 2000) was a Nazi war criminal and was a German commander in the SS and the adjutant to Richard Baer, who was a commandant of Auschwitz I concentration camp from May 1944 to December 1944.
 In 2006, a photo album created by Höcker (the Höcker Album), with some 116 pictures from his time at Auschwitz, was given to the United States Holocaust Memorial Museum, sparking new interest in his activities as a concentration camp administrator.
Albert Kahn Associates is an architectural design firm in Detroit, Michigan with a second office located in São Paulo, Brasil.
 It was established in 1895 and is still active today.
 It introduced a new technology in industrial building involving a unique reinforced concrete method referred to as the Kahn System of construction using proprietary patented reinforcement steel manufactured by Trussed Concrete Steel Company.
 The building of automobile factories and other types of factories were revolutionized from wooden timber framing construction.
 Besides being an advanced technology in strength that led to wider open interior spaces, it featured a high degree of fire resistance and larger window space for light.
 The firm started by Albert Kahn built factories for Chrysler for over a decade, Ford Automobile for 30 years and Packard Automobile for 35 years.
 Other important clients of the firm were Republic Steel and General Motors.
 The firm was awarded a $40 million dollar contract to build a tractor factory in Russia in 1928.
 The firm's output was over a million dollars worth of work per week by 1929.
 By 1939, the firm designed 19 percent of all industrial buildings in the United States and had designed some $800 million of buildings worldwide.
 Currently, Albert Kahn Associates is still making history with state-of-the-art projects.
 Recent projects include creating the world's largest penguin conservatory,located at the Detroit Zoo, which opened in 2016.
DELAG, acronym for "Deutsche Luftschiffahrts-Aktiengesellschaft" (German for "German Airship Travel Corporation"), was the world's first airline to use an aircraft in revenue service.
 It was founded on 16 November 1909 and operated Zeppelin rigid airships manufactured by the Luftschiffbau Zeppelin Corporation.
 Its headquarters were located in Frankfurt, Germany.
A Zeppelin was a type of rigid airship named after the German Count Ferdinand von Zeppelin (] ) who pioneered rigid airship development at the beginning of the 20th century.
 Zeppelin's notions were first formulated in 1874 and developed in detail in 1893.
 They were patented in Germany in 1895 and in the United States in 1899.
 After the outstanding success of the Zeppelin design, the word "zeppelin" came to be commonly used to refer to all rigid airships.
 Zeppelins were first flown commercially in 1910 by Deutsche Luftschiffahrts-AG (DELAG), the world's first airline in revenue service.
 By mid-1914, DELAG had carried over 10,000 fare-paying passengers on over 1,500 flights.
 During World War I the German military made extensive use of Zeppelins as bombers and scouts, killing over 500 people in bombing raids in Britain.
The R38" class (also known as the A" class) of rigid airships was designed for Britain's Royal Navy during the final months of the First World War, intended for long-range patrol duties over the North Sea.
 Four similar airships were originally ordered by the Admiralty, but orders for three of these ("R39", "R40" and "R41") were cancelled after the armistice with Germany and "R.38", the lead ship of the class, was sold to the United States Navy in October 1919 before completion.
 On 23 August 1921, "R-38" was destroyed by a structural failure while in flight over the city of Hull.
 It crashed into the Humber estuary, killing 44 out of the 49 crew aboard.
 At the time of its first flight it was the world's largest airship.
 Its destruction was the first of the great airship disasters, followed by the Italian-built US semi-rigid airship "Roma" in 1922 (34 dead), the French "Dixmude" in 1923 (52 dead), the British R101 in 1930 (48 dead), the  in 1933 (73 dead), and the German "Hindenburg" in 1937 (36 dead).
Karl Arnstein (March 24, 1887, Prague – December 12, 1974, Bryan, Ohio) was one of the most important 20th century airship engineers and designers in Germany and the United States of America.
 He was born in Prague, Bohemia (now the Czech Republic) to Jewish parents.
 He developed stress analysis methods that have been incorporated into airships and airplane materials.
 Before his involvement in airships he was one of the main engineers in building the Swiss Langwieser Viaduct.
 Arnstein was the chief designer of the U.S. Navy airships, USS Akron and USS Macon.
Thomas Greenhow Williams "Tex" Settle (born November 4, 1895 in Washington, D.C. – died April 28, 1980, Bethesda, Maryland) was an officer of the United States Navy who on November 20, 1933, together with Army major Chester L. Fordney, set a world altitude record in the "Century of Progress" stratospheric balloon.
 An experienced balloonist, long-time flight instructor, and officer on the airships  and  , Settle won the Litchfield Trophy in 1929 and 1931, the International Gordon Bennett Race in 1932, the Harmon Aeronaut Trophy for 1933, and the Harmon National Trophy for 1932 and 1933.
 He also set numerous distance and endurance records.
Albert Sammt (1889 in Niederstetten – 1982 Niederstetten) was a German commander of Zeppelin-airships.
Philip Mark Breedlove (born September 21, 1955) is a retired four-star General in the United States Air Force who served as the Commander, U.S. European Command, as well as the 17th Supreme Allied Commander Europe (SACEUR) of NATO Allied Command Operations, from May 2013 until May 4, 2016.
 He previously served as the Commander, U.S. Air Forces Europe, which he concurrently served as Commander, U.S. Air Forces Africa, Commander, Air Component Command, Ramstein, and Director, Joint Air Power Competence Center.
 He previously served as the 36th Vice Chief of Staff of the United States Air Force from January 14, 2011, to July 27, 2012.
 On 10 May 2013, in a ceremony in Stuttgart, Germany, Breedlove took over the command of USEUCOM.
 Three days later, on May 13, 2013, he assumed command as SACEUR.

Question: Albert Sammt was a German commander of rigid airships that were patented in Germany in 1895, and in the United States in what  year?
Answer: 1899