On Thu, 12 May 2005 07:46:04 -0400, Ron Natalie
wrote:

The WASHINGTON Sectional and Terminal Area charts for over
a year now depict both the ADIZ and the FRX. The FRZ as well
as the expanded prohibited area over Camp David are displayed
on a white background. This is a depiction used nowhere else
in US charting.

The New York sectional uses the same white background circle to show
what area would be in the 30NM expanded TFR around ENE when activated.