Today on "Special Report":

CIA chief Tenet (search) tells Sept. 11 panel that officials knew of Al Qaeda (search) threat — FBI head Mueller (search) also takes the stand in front of the bipartisan panel — We'll have the details.

GUEST PREVIEW: Why is Rep. Sensenbrenner calling for a 9/11 commissioner's resignation? We'll get answers.

Carl Cameron reports: John Kerry takes his campaign for college votes to N.Y., where he also offers up criticism of Bush's Iraq policy.

Jim Angle reports: Have intelligence agencies found better ways to communicate since Sept. 11?

Details on those stories and more on Special Report with Brit Hume at 6 p.m. ET.

— Guests and topics are subject to change