"The people behind that deadly day are still at it. They live and plan and train in safe havens along the Pakistan-Afghanistan border," Chairman of the Joint Chiefs of Staff Mike Mullen said.
Addressing the 91st annual American Legion Convention, Mullen said, "My mission, the one currently given to me by the President, is to prevent that from happening. And that's what we're going to do."
Mullen said that Pakistanis are waging their war against extremists and in Afghanistan, the war being waged to defeat al-Qaeda.
"We have got to help them. That is why I ordered the establishment of a Pakistan-Afghanistan coordination cell, inside my own staff, to work exclusively on the issues of that region, to stay engaged," Mullen said.