All the warnings are for overseas, though. Europe is facing a deadline of August 18-20 for getting out of Iraq, but I believe the U.S. was cleared by spiritual authorities last year for "open season" attacks, so I'm still preparing for the August 5-8 window.
PERSONAL OPINION...
Whenever is see the term "worldwide;" I consider the USA as part of the "world."
Before 9/11, we were pretty sure something was about to happen overseas as well.. I'd open the window up to the 15th (end of ww2)... Probably might as well let it run till 9/11. Though, it never really closes, I suppose.