Barbara Walters ranked former CIA director and Gen. David Petraeus No. 1 on her list of the "10 most fascinating people" of 2012, an ABC special that aired Wednesday.

David Petraeus' wife, Holly, threatened to divorce her husband in light of his extramarital affair with his biographer, Paula Broadwell, according to a source. The scandal forced Petraeus to resign as CIA director and now it might cost him his 38-year marriage with Holly, with whom he shared two adult children.

Former CIA director David Petraeus and Gen. John Allen asked Tampa socialite Jill Kelley to intervene in what could have been a threat to the safety of the U.S. troops made by radio host Bubba the Love Sponge, according to emails released by the city of Tampa.

In their first public appearance together since news of her extramarital affair went public, Paula Broadwell and her husband Scott left Washington, D.C., and moved back into their Charlotte, S.C., home to face the scandal with their close family and friends.