John McCain, Lindsey Graham: Rethink Afghanistan in light of Iraq unrest --- Fresh back from a trip to the Middle East, Sens. John McCain, R-Ariz., and Lindsey Graham, R-Ariz., discuss what lessons the U.S. can learn from the violence in Iraq as it prepares to leave Afghanistan. - More, CBS News, http://www.cbsnews.com/videos/john-mccain-lindsey-graham-rethink-afghanistan-in-light-of-iraq-unrest/