The ones about Saudi Arabia's involvement with the Sept. 11 massacre. The New Republic reports:
[A]n official who has read the report tells The New Republic that the support described in the report goes well beyond that: It involves connections between the hijacking plot and the very top levels of the Saudi royal family. "There's a lot more in the 28 pages than money. Everyone's chasing the charities," says this official. "They should be chasing direct links to high levels of the Saudi government. We're not talking about rogue elements. We're talking about a coordinated network that reaches right from the hijackers to multiple places in the Saudi government."
Link via Matthew Yglesias.