My favorite from the whole 9/11 experience is this CBS News article from JULY 26, 2001 which states:

"In response to inquiries from CBS News over why Ashcroft was traveling exclusively by leased jet aircraft instead of commercial airlines, the Justice Department cited what it called a "threat assessment" by the FBI, and said Ashcroft has been advised to travel only by private jet for the remainder of his term. Now, after the fact, the government says this article is not true, never happened, dunno what you're talking about, move along here."

But they haven't gotten ahold of the Ministry of Truth yet.