Add one more subject for attorney general nominee Michael Mukasey to bone up on ahead of a crucial meeting with Sen. Patrick Leahy, D-Vt., and his confirmation hearing, expected to start later this month.

On top of explaining unfulfilled records requests concerning the firing of nine U.S. Attorneys in 2006, the controversial warrantless spying program, and the fight over executive privilege regarding subpoenaed White House officials, Mukasey must now prepare to answer questions about secret Department of Justice memos justifying questionable CIA interrogation practices.