What about Cheney’s trip was ‘unreportable’?

From today’s pool report from Vice President Cheney’s trip to Japan: “This was largely a repeat of the speech delivered the day before in Tokyo. However, the vice president made something clear this day that had been unanswered the day before — when he had departed from a prepared text in Tokyo that had read Americans “do not” accept a policy of retreat and instead said that Americans “will not” accept a policy of retreat. Your pool’s queries about the meaning of this departure in tenses went unanswered last night in what started as a background briefing with an administration official and lapsed into something else that is, well, unreportable.”