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  2. National Security Area - Wikipedia

    en.wikipedia.org/wiki/National_Security_Area

    On VFR sectional charts, NSAs are delimited by a heavy dashed magenta border and a special notation. When not referring to aviation, a National Security Area is a designated area temporarily placed under the command of the National Nuclear Security Administration .

  3. List of countries and territories by number of land borders

    en.wikipedia.org/wiki/List_of_countries_and...

    Countries by land border length Antarctica and countries in purple are those without any land border. This list gives the number of distinct land borders of each country or territory, as well as the neighboring countries and territories. The length of each border is included, as is the total length of each country's or territory's borders. [1]

  4. Lists of sovereign states and dependent territories - Wikipedia

    en.wikipedia.org/wiki/Lists_of_sovereign_states...

    List of countries and territories by number of land borders; List of countries and territories by land and maritime borders; List of countries and territories by border/area ratio; List of countries and territories by maritime boundaries; List of countries and territories by the United Nations geoscheme

  5. List of countries and territories by the United Nations ...

    en.wikipedia.org/wiki/List_of_countries_and...

    This is a list of countries and territories by the United Nations geoscheme, including 193 UN member states, two UN observer states (the Holy See [note 1] and the State of Palestine), two states in free association with New Zealand (the Cook Islands and Niue), and 49 non-sovereign dependencies or territories, as well as Western Sahara (a disputed territory whose sovereignty is contested) and ...

  6. List of administrative divisions by country - Wikipedia

    en.wikipedia.org/wiki/List_of_administrative...

    List of national capitals serving as administrative divisions; List of autonomous areas by country; List of sovereign states; List of political and geographic subdivisions by total area, comparing continents, countries, and first-level administrative country subdivisions. List of first-level administrative divisions by population

  7. List of political and geographic borders - Wikipedia

    en.wikipedia.org/wiki/List_of_political_and...

    Below are separate lists of countries and dependencies with their land boundaries, and lists of which countries and dependencies border oceans and major seas. The first short section describes the borders or edges of continents and oceans/major seas. Disputed areas are not considered.

  8. Air defense identification zone - Wikipedia

    en.wikipedia.org/wiki/Air_defense_identification...

    An air defense identification zone (ADIZ) is a region of airspace in which a country tries to identify, locate, and control aircraft in the interest of national security. [1] It is declared unilaterally [2] and may extend beyond a country's territory to give the country more time to respond to possibly hostile aircraft. [3]

  9. List of countries and territories by land and maritime borders

    en.wikipedia.org/wiki/List_of_countries_and...

    Land borders and maritime boundaries are included and are tabulated separately and in combination. For purposes of this list, " maritime boundary " includes boundaries that are recognized by the United Nations Convention on the Law of the Sea , which includes boundaries of territorial waters , contiguous zones , and exclusive economic zones .