120 memorable photos of 2012

This July 13, 2011, photo, made available on the International Security Assistance Force's Flickr website shows the former Commander of International Security Assistance Force and U.S. Forces-Afghanistan Gen. Davis Petraeus, left, shaking hands with Paula Broadwell, co-author of "All In: The Education of General David Petraeus." Petraeus resigned as CIA director over his extramarital affair with his biographer, Broadwell.

Credit: AP Photo, file