ATC
Feds clamp down on Washington airspace
When the federal government raised the terrorist threat index early last month to Code Orange, it piggybacked with it an Air Defense Identification Zone (A

When the federal government raised the terrorist threat index early last month to Code Orange, it piggybacked with it an Air Defense Identification Zone (ADIZ) that blanketed the Washington-Baltimore metropolitan area.

The ADIZ was created in the airspace under 18,000 ft in a roughly 30-mile radius around the Washington VOR, and further tightened security measures by replacing the 15-mile temporary flight restriction (TFR) around the capital with a flight restricted zone (FRZ). The FRZ overlays the boundaries of the old TFR, up to but not including FL180.

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