1 / 6
Marine Gen. John R. Allen, commander of the International Security Assistance Force gestures during a news conference at the Pentagon, Wednesday, May 23, 2012. (AP Photo/Haraz N. Ghanbari)

Army general cleared in Petraeus case

A Pentagon investigation has cleared Gen. John Allen, the top U.S.

commander in Afghanistan, of professional misconduct in exchanging

emails with a civilian woman linked to the sex scandal that led retired

Gen. David Petraeus to resign as CIA director. The swiftly unfolding drama  unearthed a web of intrigue, politics, and, yes, email. Here, a who’s who of the scandal.