Gen. David Petreaus speaks at USC dinner for veterans and ROTC students in Los Angeles

Former CIA director David Petraeus displays a token of appreciation presented to him following Petraeus' address at a University of Southern California event honoring the military on March 26, 2013 in Los Angeles, California. In the first public appearance since stepping down last November as head of the CIA after admitting to an affair, Petraeus said he regretted and apologized for the circumstances that led to his resignation. UPI/Jim Ruymen