German Foreign Minister Guido Westerwelle arrived in Afghanistan on an unannounced visit Thursday morning. During the visit, the German minister is to meet Afghan President Hamid Karzai and the new commander of the NATO-led International Security Assistance Force (ISAF) US General John Allen. Westerwelle is expected to discuss the gradual pullout of German and other international troops from the country and the Afghanistan conference scheduled for December 5 in Bonn.