Read the history of that meeting. It's grim.
I'm not sure which books it was in, but there were several.
The Congress people involved were given very short notice of the meeting, were sworn to never mention the meeting or it's agenda, were not allowed to take aides or notes, were fed some information then dismissed.
Only later did they realize how suckered they'd been, that now the Bushies would claim to have notified Congress when they hadn't in any meaningful manner.
Simply another Bush dodge which demonstrates they knew they were wrong.
Arf