A Pakistani Air Force fighter jet flies during an air show in 2005. Pakistani war planes pounded a militant stronghold in a tribal district on the Afghan border in an operation that left 25 insurgents dead, the military said Sunday June 19, 2011. (AFP/File/Jewel Samad)

Pakistani soldiers stand guard on a mountain ridge in tribal district of Mohmand on June 1, 2011, near the Afghan border. Dozens of militants attacked the homes of two Pakistani tribal elders, killing six people in a lawless tribal district near the Afghan border, officials said Monday. (AFP/File/Aamir Qureshi)

Men harvest sea salt at a salt field in Sandspit, about 18 km (11 miles) southwest of Karachi June 18, 2011. Sea salt is produced through solar evaporation of seawaters and is the smallest source of salt in Pakistan. Labourers earn about 600 Pakistan Rupees ($7) a day. The salts are sold commercially by contractors to different industries in Pakistan and overseas. Picture taken June 18, 2011. REUTERS/Akhtar Soomro (PAKISTAN – Tags: BUSINESS ENVIRONMENT EMPLOYMENT SOCIETY)

A man puts his bag down before harvesting sea salt from a salt field in Sandspit, about 18 km (11 miles) southwest of Karachi June 19, 2011. Sea salt is produced through solar evaporation of seawaters and is the smallest source of salt in Pakistan. Labourers earn about 600 Pakistan Rupees ($7) a day. The salts are sold commercially by contractors to different industries in Pakistan and overseas. REUTERS/Akhtar Soomro (PAKISTAN – Tags: ENVIRONMENT BUSINESS EMPLOYMENT SOCIETY)