check it out...
http://terraserver.microsoft.com/

some interesting links here...

the white house has had a little whiteout on the roof
http://terraserver.microsoft.com/image.aspx?t=4&s=10&x=1616&y=21536&z=18&w=1

the capitol looks more blurry than in farenheit 9/11
http://terraserver.microsoft.com/image.aspx?t=4&s=11&x=814&y=10765&z=18&w=1

and of course:

nellis airforce range aka area 51 does not exist... how unexpected
http://terraserver.microsoft.com/image.aspx?t=1&s=19&x=5&y=39&z=11&w=1

uh oh.. crop circles..
http://terraserver.microsoft.com/image.aspx?t=1&s=13&x=339&y=2527&z=11&w=1