Trapped Inside the Beltway - 2013 was released on:
USA: 15 December 2013 (limited)
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Dateline NBC - 1992 Inside the Beltway was released on:
USA: 14 September 1998
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Inside Outside the Beltway - 1992 was released on:
USA: 20 September 1992 (Washington, D.C.)
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The Capital Beltway is located in Washington, D.C. It is the
basis of the phrase Inside the Beltway, used when referring to
issues dealing with American government and politics.
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I'm pretty sure it's short for "Beltway," as in "Inside the
Beltway" of Washington DC where most political/government action
takes place.