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  2. National Special Security Event - Wikipedia

    en.wikipedia.org/.../National_Special_Security_Event

    A National Special Security Event ( NSSE) is an event of national or international significance deemed by the United States Department of Homeland Security (DHS) to be a potential target for terrorism or other criminal activity. These events have included summits of world leaders, meetings of international organizations, presidential nominating ...

  3. Ceremony - Wikipedia

    en.wikipedia.org/wiki/Ceremony

    Ceremony. Ceremonial at court during Prinsjesdag. A ceremony ( UK: / ˈsɛrəməni /, US: / ˈsɛrəˌmoʊni /) is a unified ritualistic event with a purpose, usually consisting of a number of artistic components, performed on a special occasion. The word may be of Etruscan origin, via the Latin caerimonia. [1]

  4. List of month-long observances - Wikipedia

    en.wikipedia.org/wiki/List_of_month-long_observances

    The following is a list of notable month-long observances, recurrent months that are used by various governments, groups and organizations to raise awareness of an issue, commemorate a group or event, or celebrate something.

  5. Black swan theory - Wikipedia

    en.wikipedia.org/wiki/Black_swan_theory

    A black swan ( Cygnus atratus) in Australia. The black swan theory or theory of black swan events is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The term is based on a Latin expression which presumed that black swans did ...

  6. Special Olympics - Wikipedia

    en.wikipedia.org/wiki/Special_Olympics

    Special Olympics is the world's largest sports organization for children and adults with intellectual disabilities providing year-round training and activities to 5 million participants and Unified Sports partners in 172 countries. [2] Special Olympics competitions are held daily, all around the world—including local, national and regional ...

  7. Independence Day (United States) - Wikipedia

    en.wikipedia.org/wiki/Independence_Day_(United...

    Independence Day is commonly associated with fireworks, parades, barbecues, carnivals, fairs, picnics, concerts, baseball games, family reunions, political speeches, and ceremonies, in addition to various other public and private events celebrating the history, government, and traditions of the United States.

  8. Juneteenth - Wikipedia

    en.wikipedia.org/wiki/Juneteenth

    Juneteenth is a federal holiday in the United States. For decades, activists and congress members (led by many African Americans) proposed legislation, advocated for, and built support for state and national observances. During his campaign for president in June 2020, Joe Biden publicly celebrated the holiday. [125]

  9. Common cause and special cause (statistics) - Wikipedia

    en.wikipedia.org/wiki/Common_cause_and_special...

    Common and special causes are the two distinct origins of variation in a process, as defined in the statistical thinking and methods of Walter A. Shewhart and W. Edwards Deming. Briefly, "common causes", also called natural patterns, are the usual, historical, quantifiable variation in a system, while "special causes" are unusual, not ...