Air Defense Identification Zone ( ADIZ ) has existed since February 10 , 2003 , around the Baltimore-Washington Metropolitan Area to restrict air traffic near Washington , D.C . The ADIZ was established as a precursor to the US invasion of Iraq in 2003 . It has been erroneously connected to the September 11 attacks as a temporary measure to prevent further attacks . It was made permanent in 2008
September 11 attacks
September 11 attacks
Washington, DC Metropolitan Area Special Flight Rules Area