This file photo shows the Pakistani medium-range ballistic missile, Shaheen-1 (Hatf IV), missile being fired during a test at an undisclosed location. Pakistan on Saturday test-fired a long-range ballistic missile, Shaheen II, or Hatf VI, capable of carrying nuclear and conventional warheads, according to the military. (AFP/HO/File)

Pakistani soldiers and tanks at the Hayatabad area near the Khyber tribal agency on June 28. Pakistan's government has claimed that it has saved the northwestern city of Peshawar from militants as troops pushed forward on the second day of a major offensive against the rebels. (AFP/Tariq Mahmood)

Armoured vehicles move forward, during the Pakistan army's Zarb-e-Hadeed exercise, which started at Khairpur Tamewali, some 100 kilometers (62 miles) southeast of Multan, Pakistan on Tuesday, Aug. 26, 2008. The exercise Zarb-e-Hadeed is part of a routine training, aimed at enhancing professional competence of the troops. (AP Photo)

An Armoured vehicle moves forward, during the Pakistan army's Zarb-e-Hadeed exercise, which started at Khairpur Tamewali, some 100 kilometers (62 miles) southeast of Multan, Pakistan on Tuesday, Aug. 26, 2008. The exercise Zarb-e-Hadeed is part of a routine training, aimed at enhancing professional competence of the troops. (AP Photo)

Soldiers in a tank take part in an annual army summer exercise Zarb-e Hadeed in Cholistan August 26, 2008. REUTERS/Asim Tanveer (PAKISTAN)

Soldiers in an armoured personal carrier (APC) take part in an annual army summer exercise Zarb-e Hadeed in Cholistan August 26, 2008. REUTERS/Asim Tanveer (PAKISTAN)

Pakistan army tanks arrive at the base camp in Jamrud, a town in Pakistan's Khyber tribal area Tuesday, Dec. 30, 2008 near Peshawar. Pakistan closed the main route used to ferry supplies to U.S. and allied troops in Afghanistan on Tuesday after launching a fresh offensive against militants in the area. The road through the Khyber Pass in the northwest of Pakistan has come under increasing attacks by militants seeking to squeeze Western forces fighting a resurgent Taliban in Afghanistan in recent months. (AP Photo/Ameer Zada)