
An Afghan soldier takes position near the building which is occupied by militants in Kabul, Afghanistan, on Sept. 13, 2011. Taliban insurgents fired rocket-propelled grenades and assault rifles at the U.S. Embassy, NATO headquarters and other buildings in the heart of the Afghan capital Tuesday in a brazen attack two days after the United States marked the 10th anniversary of the Sept. 11 terror attacks. (Associated Press)

**FILE** Dust rises over Kabul, Afghanistan, on Sept. 13, 2011, as Taliban insurgents fire rocket-propelled grenades and assault rifles at the U.S. Embassy, NATO headquarters and other buildings in the heart of the Afghan capital. (Associated Press)

An Afghan soldier takes position near the building which is occupied by militants in Kabul, Afghanistan, on Sept. 13, 2011. Taliban insurgents fired rocket-propelled grenades and assault rifles at the U.S. Embassy, NATO headquarters and other buildings in the heart of the Afghan capital in a brazen attack two days after the United States marked the 10th anniversary of the Sept. 11 terror attacks. (Associated Press)

Smoke and dust rises from a building, unseen in distance, which is occupied by Taliban insurgents during a coordinated assault in Kabul, Afghanistan, on Tuesday, Sept. 13, 2011. Taliban insurgents fired rocket-propelled grenades and assault rifles at the U.S. Embassy, NATO headquarters and other buildings in the heart of the Afghan capital Tuesday while suicide bombers struck police buildings. The U.S. Embassy and NATO reported no casualties. (AP Photo/Musadeq Sadeq)

U.S. Defense Secretary Robert Gates speaks during a media conference after a meeting of NATO defense ministers at NATO headquarters in Brussels on Thursday, June 9, 2011. NATO defense ministers shift their focus from Libya to Afghanistan during talks on Thursday. (AP Photo/Virginia Mayo)

** FILE ** NATO Secretary-General Anders Fogh Rasmussen speaks during a media conference at NATO headquarters in Brussels on Wednesday, May 4, 2011. (AP Photo/Yves Logghe, File)