The Aircraft Owners and Pilots Association reports that an enormous block of airspace around Washington is off-limits to general aviation tonight because of the State of the Union Address:
During the president's speech to Congress and the nation, no flights are allowed to or from any of the 21 airports within the Washington, D.C., ADIZ, including pattern work. The special ingress/egress procedures for the "DC-3" airports inside the Flight Restricted Zone are also suspended. Only IFR flights to and from Washington Dulles International (IAD) and Baltimore/Washington International Thurgood Marshall (BWI) airports will be allowed.
This is what security expert Bruce Schneier calls "security theater."