Washington, D.C.: Perbedaan antara revisi

|location = Washington, D.C. ([[Reagan National Airport]]), normal 1981−2010, ekstrimekstrem 1871−saat ini{{efn|Official records for Washington, D.C. were kept at 24th and M Streets [[Northwest, Washington, D.C.|NW]] from January 1871 to June 1945, and at Reagan National since July 1945.<ref>[http://threadex.rcc-acis.org/ ThreadEx]</ref>}}