A week after the Washington Post reported the existence of a secret, CIA-run prison in Eastern Europe, Republican Senate Majority Leader Bill Frist and House Speaker Dennis Hastert have called on the Senate and House intelligence committees to convene a “a joint investigation” into who leaked the information. The CIA has notified the Justice Department classified information was leaked in the disclosure of the prisons. This could set the stage for a possible criminal inquiry similar to the one launched following the outing of CIA operative Valerie Plame.