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CIA. Secondary Security Screening Selection or Secondary Security Screening Selectee, known by its initials SSSS, is an airport security measure in the United States which selects passengers for additional inspection. People from certain countries are subject to it by default. [1] The passengers may be known as Selectee, Automatic Selectee or ...
Website. www .sss .gov. The Selective Service System ( SSS) is an independent agency of the United States government that maintains a database of registered U.S. citizens and other U.S. residents potentially subject to military conscription (i.e., the draft). Although the U.S. military is currently an All-Volunteer Force, registration is still ...
The 20th Space Surveillance Squadron ( 20 SPSS) is a Space Delta 2 unit located at Eglin Air Force Base, Florida with the mission to execute multiplatform, tactical space warfighting domain characterization, recognition, and responsiveness to achieve 21st Space Wing and United States Space Command intent. The unit, formerly designated the 20th ...
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Δ−. (ddd), which respectively carry an electric charge of +2 e, +1 e, 0 e, and −1 e . The Δ baryons have a mass of about 1 232 MeV/c2; their third component of isospin and they are required to have an intrinsic spin of 3 2 or higher (half-integer units). Ordinary nucleons (symbol N, meaning either a proton or neutron ), by contrast, have ...
Low Earth orbit. Altitude. 1,350 km (840 mi) Inclination. 58.0°. Period. 120.0 minutes. The Space Tracking and Surveillance System ( STSS; formerly SBIRS-Low) was a pair of satellites developed by the United States Missile Defense Agency (MDA) to research the space-based detection and tracking of ballistic missiles.
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This is a list of intelligence agencies by country. It includes only currently operational institutions. An intelligence agency is a government agency responsible for the collection, analysis, and exploitation of information in support of law enforcement, national security, military, and foreign policy objectives.