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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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight Deck
The flight deck of an aircraft carrier is the surface on which its aircraft take off and land, essentially a miniature airfield at sea. On smaller naval ships which do not have aviation as a primary mission, the landing area for helicopters and other VTOL aircraft is also referred to as the flight deck. The official U.S. Navy term for these vessels is "air-capable ships". Flight decks have been in use upon ships since 1910, the American pilot Eugene Ely being the first individual to take off from a warship. Initially consisting of wooden ramps built over the forecastle of capital ships, a number of battlecruisers, including the British and , the American and , and the Japanese ''Akagi'' and battleship ''Kaga'', were converted to aircraft carriers during the interwar period. The first aircraft carrier to feature a full-length flight deck, akin to the configuration of the modern vessels, was the converted liner which entered service in 1918. The armoured flight deck was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicago
Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of United States cities by population, third-most populous city in the United States after New York City and Los Angeles. As the county seat, seat of Cook County, Illinois, Cook County, the List of the most populous counties in the United States, second-most populous county in the U.S., Chicago is the center of the Chicago metropolitan area, often colloquially called "Chicagoland" and home to 9.6 million residents. Located on the shore of Lake Michigan, Chicago was incorporated as a city in 1837 near a Chicago Portage, portage between the Great Lakes and the Mississippi River, Mississippi River watershed. It grew rapidly in the mid-19th century. In 1871, the Great Chicago Fire destroyed several square miles and left more than 100,000 homeless, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania
Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions of the United States. It borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio and the Ohio River to its west, Lake Erie and New York (state), New York to its north, the Delaware River and New Jersey to its east, and the Provinces and territories of Canada, Canadian province of Ontario to its northwest via Lake Erie. Pennsylvania's most populous city is Philadelphia. Pennsylvania was founded in 1681 through a royal land grant to William Penn, the son of William Penn (Royal Navy officer), the state's namesake. Before that, between 1638 and 1655, a southeast portion of the state was part of New Sweden, a Swedish Empire, Swedish colony. Established as a haven for religious and political tolerance, the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an international border with the Mexico, Mexican state of Baja California to the south. With almost 40million residents across an area of , it is the List of states and territories of the United States by population, largest state by population and List of U.S. states and territories by area, third-largest by area. Prior to European colonization of the Americas, European colonization, California was one of the most culturally and linguistically diverse areas in pre-Columbian North America. European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire. The area became a part of Mexico in 1821, following Mexican War of Independence, its successful war for independence, but Mexican Cession, was ceded to the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the List of California cities by population, fourth-most populous city in the U.S. state of California and the List of United States cities by population, 17th-most populous in the United States. San Francisco has a land area of at the upper end of the San Francisco Peninsula and is the County statistics of the United States, fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the Metropolitan statistical area#United States, 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Francisco Bay Area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive with a respective county. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of finance and commerce, culture, technology, entertainment and media, academics, and scientific output, the arts and fashion, and, as home to the headquarters of the United Nations, international diplomacy. With an estimated population in 2024 of 8,478,072 distributed over , the city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the nation's second-most populous city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warren G
Warren Griffin III (born November 10, 1970) is an American rapper, songwriter, record producer, and DJ who helped popularize West Coast hip hop during the 1990s.Steve Huey"Warren G: Biography" ''AllMusic.com'', Netaktion LLC, visited May 8, 2020. A pioneer of G-funk, he attained mainstream success with his 1994 single " Regulate" (featuring Nate Dogg). He is credited with discovering Snoop Dogg, having introduced the then-unknown rapper to record producer Dr. Dre. His debut studio album, '' Regulate... G Funk Era'' (1994), debuted at number two on the U.S. ''Billboard'' 200, selling 176,000 in its first week. The album has since received triple platinum certification by the Recording Industry Association of America (RIAA), signifying sales of three million copies. "Regulate" spent 18 weeks within the top 40 of the ''Billboard'' Hot 100, with three weeks at number two, while its follow-up, " This D.J.", peaked at number nine. At the 37th Annual Grammy Awards, both songs recei ... [...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. The president directs the Federal government of the United States#Executive branch, executive branch of the Federal government of the United States, federal government and is the Powers of the president of the United States#Commander-in-chief, commander-in-chief of the United States Armed Forces. The power of the presidency has grown since the first president, George Washington, took office in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasing role in American political life since the beginning of the 20th century, carrying over into the 21st century with some expansions during the presidencies of Presidency of Franklin D. Roosevelt, Franklin D. Roosevelt and Presidency of George W. Bush, George W. Bush. In modern times, the president is one of the world's most powerful political figures and the leader of the world's ... [...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, Victoria, Texas, on February 27, 1871, to Herman Praeger and Louisa Schultze. He attended the public schools in San Antonio, Texas, 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. Airma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postmaster General Of The United States
The United States postmaster general (PMG) is the chief executive officer of the United States Postal Service (USPS). The PMG is responsible for managing and directing the day-to-day operations of the agency. The PMG is selected and appointed by the Board of Governors of the United States Postal Service, Board of Governors of the Postal Service, which is appointed by the president. The postmaster general then also sits on the board. The PMG does not serve at the president's pleasure and can only be dismissed by the Board of Governors. The appointment of the postmaster general does not require Senate confirmation. The governors and the postmaster general elect the deputy postmaster general. The most recent officeholder is Louis DeJoy, who was appointed on June 16, 2020. DeJoy resigned on March 24, 2025. History The office of U.S. postmaster general dates back to country's founding. The first position, during the colonial-era British America, was that of Postmaster General of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
