David H. Petraeus

Former CIA Director David Petraeus, who resigned last fall following an extra-marital affair, is re-entering public life. And in his first speech since resigning, made an apology.

FOX News Radio's Steve Knight reports:

Petraeus was just moments into a his first public speech since resigning...

(Petraeus) "How deeply IĀ regretĀ and apologize for."

...his extra-marital affair with biographer Paula Broadwell.

Petraeus spoke at the University of Southern California's ROTC dinner:

(Petraeus) "Perhaps my experience can be instructive to others who stumble or indeed fall as far as I did."

The FBI discovered the affair.

Petraeus quickly resigned from the CIA and submerged himself in private life, trying to repair the admitted damage.

A high-powered Washington attorney is helping Petraeus develop a new role for himself as a voice on veterans issues and in the private sector.

Steve Knight, FOX News Radio.