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Thread: AA Guide: DCA / Reagan Washington National Airport - MCT, Connection, etc.
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Old Oct 16, 2014 | 12:27 pm
  #179  
CMK10
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Originally Posted by IADCAflyer
X is more appropriate. X for total unkown or X files
Plus it serves as a placeholder, like in LAX or PDX. That isn't a gate, it's a placeholder until you get on the dreaded bus
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