General David Petraeus, commander of U.S. forces in Afghanistan, is expected to leave that job by early fall. And the question has been, where does he go from there?

Several sources, including government officials, say Petraeus is being seriously considered for CIA director, and would take the job if offered.

The current spy chief, Leon Panetta, is currently seen as the top replacement for Defense Secretary Robert Gates, who says he will step down this year.