Jim wrote:
The White House is being evacuated due to a TFR or ADIZ incursion.

From
http://www.foxnews.com/story/0,2933,103616,00.html

WASHINGTON — At least part of the White House (search) was evacuated
Thursday after a false radar reading mistakenly indicated that a plane
flew within five miles of restricted airspace around the complex,
officials said.


"It's a false radar target," said William Shumann, Federal Aviation
Administration (search) spokesman. "When the NORAD fighters got to the
location of the alleged violation, they found nothing."

The North American Aerospace Defense Command (search), or NORAD, is the
command center for the defense of U.S. and Canadian airspacursday morning.

An aide to President Bush said that staffers were told to go to a nearby
street but were allowed to go back to their desks a short time later.

The president was traveling in Britain at the time. Many of his top
aides also were on the trip and not in the building.

"The threat level was never raised," Mitchell said.

On Nov. 10, Air Force fighter jets scrambled to intercept a private
plane that flew too close to the White House. The plane was later
determined not to be a threat.

The president was away then, also, on a trip to Arkansas and South Carolina.