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1921 In Aviation
This is a list of aviation-related events from 1921: Events * Mexicana de Aviación begins service. * The Imperial Japanese Navy acquires its first rigid and semi-rigid airships. * The Italian General Giulio Douhet publishes his highly influential book ''Command of the Air''. In it, he argues that the ability of aircraft to fly over armies and navies renders those forces of secondary importance; that the vastness of the sky makes defense against bombers impossible; that only offensive bombing to destroy the enemys air force can allow a country to achieve command of the air; that once it is achieved, a bombing campaign can be carried out against enemy "vital centers", including industry, transportation, government, communications, and "the will of the people;" and that success against enemy civilian morale in particular would be the key to victory. * When the Italian Chief of the Naval Staff Admiral Paolo Thaon di Revel argues for the development of aircraft carriers, saying "t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviation
Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through buoyancy. Some of the most significant advancements in aviation technology came with the controlled gliding flying of Otto Lilienthal in 1896; then a large step in significance came with the construction of the first powered airplane by the Wright brothers in the early 1900s. Since that time, aviation has been technologically revolutionized by the introduction of the jet which permitted a major form of transport throughout the world. Etymology The word ''aviation'' was coined by the French writer and former naval officer Gabriel La Landelle in 1863. He derived the term from the v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airmails Of The United States
United States airmail was a service class of the United States Post Office Department (USPOD) and its successor United States Postal Service (USPS) delivering air mail by aircraft flown within the United States and its possessions and territories. Letters and parcels intended for air mail service were marked as "Via Air Mail" (or equivalent), appropriately franked, and assigned to any then existing class or sub-class of the Air Mail service. After an intermittent series of government sponsored experimental flights between 1911 and 1918, domestic U.S. Air Mail was formally established as a new class of service by the Post Office Department on May 15, 1918, with the inauguration of the Washington–Philadelphia–New York route for which the first of special Air Mail stamps were issued. The exclusive transportation of flown mails by government operated aircraft came to an end in 1926 under the provisions of the "Kelly Act" which required the USPOD to transition to contracting w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illinois
Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria metropolitan area, Illinois, Peoria and Rockford metropolitan area, Illinois, Rockford, as well Springfield, Illinois, Springfield, its capital. Of the fifty U.S. states, Illinois has the List of U.S. states and territories by GDP, fifth-largest gross domestic product (GDP), the List of U.S. states and territories by population, sixth-largest population, and the List of U.S. states and territories by area, 25th-largest land area. Illinois has a highly diverse Economy of Illinois, economy, with the global city of Chicago in the northeast, major industrial and agricultural productivity, agricultural hubs in the north and center, and natural resources such as coal, timber, and petroleum in the south. Owing to its centr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicago
(''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name = United States , subdivision_type1 = State , subdivision_type2 = Counties , subdivision_name1 = Illinois , subdivision_name2 = Cook and DuPage , established_title = Settled , established_date = , established_title2 = Incorporated (city) , established_date2 = , founder = Jean Baptiste Point du Sable , government_type = Mayor–council , governing_body = Chicago City Council , leader_title = Mayor , leader_name = Lori Lightfoot ( D) , leader_title1 = City Clerk , leader_name1 = Anna Valencia ( D) , unit_pref = Imperial , area_footnotes = , area_tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania
Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio to its west, Lake Erie and the Canadian province of Ontario to its northwest, New York to its north, and the Delaware River and New Jersey to its east. Pennsylvania is the fifth-most populous state in the nation with over 13 million residents as of 2020. It is the 33rd-largest state by area and ranks ninth among all states in population density. The southeastern Delaware Valley metropolitan area comprises and surrounds Philadelphia, the state's largest and nation's sixth most populous city. Another 2.37 million reside in Greater Pittsburgh in the southwest, centered around Pittsburgh, the state's second-largest and Western Pennsylvania's largest city. The state's su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dubois, Pennsylvania
DuBois ( ) is a city and the most populous community in Clearfield County, Pennsylvania, United States. DuBois is located approximately northeast of Pittsburgh. The population was 7,510 as of the 2020 United States census, 2020 census. It is the principal city in the DuBois, PA Micropolitan Statistical Area. DuBois is also one of two principal cities, the other being State College, Pennsylvania, State College, that make up the larger State College-DuBois, PA Combined Statistical Area. History Settled in 1812 and platted in 1872, DuBois was incorporated as a borough (Pennsylvania), borough in 1881 and as a city in 1914. The town was founded by John Rumbarger, for whom the town was originally named. The Rumbarger Cemetery is all that survives of John Rumbarger's "original settlement" in the city of DuBois. The town was later renamed for local lumber magnate John DuBois, who came from a longstanding American family of French Huguenot descent. Many of the town's original buildings ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territories of the United States by population, most populous U.S. state and the List of U.S. states and territories by area, 3rd largest by area. It is also the most populated Administrative division, subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous Statistical area (United States), urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento, California, Sacramento is the state's capital, while Los Angeles is the List of largest California cities by population, most populous city in the state and the List of United States cities by population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of California cities by population, fourth most populous in California and List of United States cities by population, 17th most populous in the United States, with 815,201 residents as of 2021. It covers a land area of , at the end of the San Francisco Peninsula, making it the second most densely populated large U.S. city after New York City, and the County statistics of the United States, fifth most densely populated U.S. county, behind only four of the five New York City boroughs. Among the 91 U.S. cities proper with over 250,000 residents, San Francisco was ranked first by per capita income (at $160,749) and sixth by aggregate income as of 2021. Colloquial nicknames for San Francisco include ''SF'', ''San Fran'', ''The '', ''Frisco'', and '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the List of United States cities by population density, most densely populated major city in the United States, and is more than twice as populous as second-place Los Angeles. New York City lies at the southern tip of New York (state), New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the world by urban area, urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous Megacity, megacities, and over 58 million people live within of the city. New York City is a global city, global Culture of New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warren G
Warren Griffin III (born November 10, 1970) is an American rapper and producer known for his role in West Coast rap's 1990s ascent.Steve Huey"Warren G: Biography" ''AllMusic.com'', Netaktion LLC, visited May 8, 2020. Along with Snoop Dogg and Nate Dogg, he formed the hip-hop trio 213, named for Long Beach's area code. A pioneer of G-funk, he attained mainstream success with the 1994 single " Regulate", a duet with Nate Dogg. The younger stepbrother of rapper Dr. Dre, he introduced him to Snoop Dogg, who Dre later signed. His debut album, '' Regulate... G Funk Era'', debuted at #2 on the US Billboard 200 chart, selling 176,000 in its opening week. The album later went on the sell over 3 million copies in the US and was certified 3x multi-platinum. The single " Regulate" spent 18 weeks in the Top 40 of the Billboard Hot 100, with three weeks at No. 2, while " This D.J.", reached No. 9. Both songs earned Grammy nominations. Three songs from his second album, ''Take a Look Over Y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
President Of The United States
The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces. The power of the presidency has grown substantially since the first president, George Washington, took office in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasingly strong role in American political life since the beginning of the 20th century, with a notable expansion during the presidency of Franklin D. Roosevelt. In contemporary times, the president is also looked upon as one of the world's most powerful political figures as the leader of the only remaining global superpower. As the leader of the nation with the largest economy by nominal GDP, the president possesses significant domestic and international hard and soft power. Article II of the Constitution establ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Praeger
Otto Praeger (February 27, 1871 – February 4, 1948) was the Washington, D.C., postmaster from 1913 to 1915 and was the Second Assistant United States Postmaster General from 1915 to 1921. He was responsible for implementing airmail from 1918 to 1927. Biography Praeger was born in Victoria, Texas, on February 27, 1871, to Herman Praeger and Louisa Schultze. He attended the public schools in San Antonio, Texas, then the University of Texas. In 1889 he started work as a newspaper reporter, then an editor, and he worked in journalism until 1914. He married Annie C. Hardesty on February 27, 1897. He married Carrie Will Coffman on April 20, 1928. On April 1, 1913, Praeger became the postmaster for Washington, D.C., remaining in that position until September 1, 1915, when he became Second Assistant Postmaster General of the United States. On May 15, 1918, Postmaster General Albert S. Burleson assigned him additional duty as chief of the U.S. Airmail Service, telling Praeger, "The ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
