David Petraeus — American Soldier born on November 07, 1952,

David Howell Petraeus AO is a retired American military officer and public official. He served as Director of the Central Intelligence Agency from September 6, 2011, until his resignation on November 9, 2012. Prior to his assuming the directorship of the CIA, Petraeus was a highly decorated four-star general, serving over 37 years in the United States Army. His last assignments in the Army were as commander of the International Security Assistance Force and Commander, U.S. Forces Afghanistan from July 4, 2010, to July 18, 2011. His other four-star assignments include serving as the 10th Commander, U.S. Central Command from October 13, 2008, to June 30, 2010, and as Commanding General, Multi-National Force – Iraq from February 10, 2007, to September 16, 2008. As commander of MNF-I, Petraeus oversaw all coalition forces in Iraq... (wikipedia)

The art of coalition command - whether it is here in Afghanistan, whether it was in Iraq or in Bosnia or in Haiti - is to take the resources you are provided with, understand what the strengths and weaknesses are and to employ them to the best overall effect.
We're here so that Afghanistan does not once again become a sanctuary for transnational extremists the way it was when al-Qaeda planned the 9/11 attacks in the Kandahar area, conducted the initial training for the attackers in training camps in Afghanistan before they moved on to Germany and then to U.S. flight schools.
Well, the oil, the oil spot, if you will, is a, is a term in counterinsurgency literature that connotes a peaceful area, secure area. So what you're trying to do is to always extend that, to push that out.
This is actually true of the overall fight against al-Qaeda and trans-national extremists, that as you put pressure on them in one location, they'll seek safe haven sanctuaries in other areas. So you do have to continue to pursue them. But they have less capability.
The fact is that Iran doesn't want to see the Taliban come back any more than do most Afghan citizens.