PBS Newshour: As U.S.-Afghan relations hit new barrier, what options exist for security deal?

Amid efforts to strike a U.S.-Afghanistan security deal that would outline American presence in the nation after 2014, the Afghan government released 37 prisoners the U.S. claims are a security threat. Gwen Ifill talks to former Defense Department official David Sedney and Zalmay Khalilzad, former U.S. Ambassador to Afghanistan.