A Pakistani doctor examines a child brought to hospital after being injured in a car bomb attack in Lahore. A suicide car bomber has devastated offices used to interrogate suspected militants in Lahore, killing up to 13 people in the latest attack on Pakistan's cultural capital. (AFP/Arif Ali) March 9, 2010

Pakistani relatives stand next to an injured youth at a hospital in Dera Ismail Khan. Four people have been killed and over two dozen wounded, most of them police officials, in a suicide car-bomb attack on a police station in northwest Pakistan on Saturday. (AFP/Naseer Azam) February 27, 2010

Pakistani fire fighters and other official are seen near oil tanker, carrying fuel supplies for NATO forces in neighboring Afghanistan, after it was allegedly attacked by militants in Peshawar, Pakistan, Thursday, Feb. 25, 2010. Militants have frequently attacked trucks traveling through the Khyber pass carrying supplies to NATO and US troops in landlocked Afghanistan. (AP Photo/Mohammad Sajjad) February 26, 2010

Shopkeepers and police set aside casualties from the site of a bomb blast in Mingora, located in Pakistan's restive North West Frontier Province on February 22, 2010. A suicide bomber attacked a security force convoy in a market area in the main town in Pakistan's Swat valley on Monday killing six people. (REUTERS/Hazrat Ali Bacha) February 22, 2010

A young Afghan refugee girl plays with a tire in an alley of a poor neighborhood of Rawalpindi, Pakistan, Friday, Feb. 19, 2010. The Pakistani government and the United Nations refugee agency reached an agreement in March 2009, to allow some 1.7 million registered Afghan refugees living in Pakistan to continue sheltering there until at least 2012, thousands of them still live without electricity, running water and other basic services. (AP Photo/Muhammed Muheisen) February 20, 2010

Pakistan police officers examine the site of a bomb explosion at a busy intersection in Dadu, southern Pakistan, Sunday, Feb. 14, 2010. The explosion on Sundaykilled three people in an area that has avoided much of the Taliban-led violence plaguing the country. (AP Photo/Pervez Masih) February 14, 2010

File photo shows a young girl next to the rubble of a school building destroyed by militants in Pakistan. The Taliban blew up a girls' school on Sunday in northwest Pakistan, where troops are battling a militant insurgency, police said. (AFP/File/Waheed Afridi) January 24, 2010

Pakistani labors are on their way to work as fog envelopes Lahore, Pakistan, on Monday Jan. 18, 2010. The dense fog disrupted flights, train schedules and forced authorities to close several highway sections in Pakistan. (AP Photo/K.M.Chaudary) January 19, 2010

Pakistani volunteers remote a body following an explosion in Karachi. Eight suspected insurgents were killed when explosives intended for a bomb attack accidentally blew up, destroying a militant safe house in Pakistan's financial capital Karachi, January 8, 2010. (AFP/Rizwan Tabassum) January 10, 2010

Pakistan women hold placards during a rally to condemn Monday's suicide bombing over a Shiites procession, Saturday, Jan. 2, 2010 in Karachi, Pakistan. (AP Photo/Fareed Khan) January 2, 2010

A laborer rests beside sacks of onions in a vegetable market in Lahore December 19, 2009. (REUTERS/Mohsin Raza) December 19, 2009

Women take part in a working women's rally in Lahore March 7, 2010, ahead of International Women's Day on March 8. (REUTERS/Mohsin Raza ) March 7, 2010

An Afghan refugee girl holds a bouquet of wilted flowers she found on the ground with her family's makeshift house in the background in an alley of a poor neighborhood of Rawalpindi, Pakistan, Thursday, March 4, 2010. (AP Photo/Muhammed Muheisen) March 5, 2010

Soldiers walk through a cave, which the Pakistan Army said was built and used by the Pakistan Taliban in Damadola, located in Bajaur Agency in Pakistan's Federally Administered Tribal Areas (FATA) along the Afghan border March 2, 2010. (REUTERS/Adrees Latif) March 3, 2010

People pass an oil tanker attacked by alleged militants in Peshawar, Pakistan on Monday, March 1, 2010. Pakistani militants have attacked the tanker carrying fuel to NATO and US forces in Afghanistan. (AP Photo/Mohammad Sajjad) March 1, 2010

Pakistani and Afghan refugee men are seen attending Muslim's Maghreb or dusk prayer next to a grocery store in Islamabad, Pakistan, Monday, Feb. 22, 2010. (AP Photo/Muhammed Muheisen) February 24, 2010

Namuna, 8, and younger brother Maaz, 3, take part in a rally in Islamabad, together with hundreds of supporters of the religious political party Jamaat-e-Islami, as they called for the U.S. government to release Aafia Siddiqui, on February 21, 2010. Siddiqui, a Pakistani neuroscientist, was recently convicted of assault with a deadly weapon and attempting to kill U.S. soldiers and Federal Bureau of Investigation agents who were seeking to interrogate her while she was in custody in Afghanistan. The placard in Urdu reads, "feel ashamed." (REUTERS/Adrees Latif) February 21, 2010

Family members stand over their relative, who was injured by a bomb blast in Pakistan's Khyber region, after he was brought for treatment at the Lady Reading hospital in Peshawar on February 18, 2010. A bomb in a village in the Khyber region on the Afghan border killed 30 people, including the commander of a militant faction which is not part of Pakistan's main Taliban alliance, security officials said. (REUTERS/Fayaz Aziz) February 19, 2010

Afghan refugee children, gather in a poor neighborhood of Rawalpindi, Pakistan, Tuesday, Feb. 17, 2010. (AP Photo/Muhammed Muheisen) February 17, 2010

Supporters of Pakistan's former Prime Minister Nawaz Sharif burn an effigy of Pakistan's President Asif Ali Zardari during a protest rally in Lahore, Pakistan on Monday, Feb. 15, 2010. The country's leading opposition figure, Nawaz Sharif, said President Asif Ali Zardari's decision to appoint two judges opposed by the court showed he was 'the biggest threat to democracy.' (AP Photo/ K.M.Chaudary) February 15, 2010

Pakistani vendors, selling heart shaped balloons for upcoming Valentine's Day, wait for customers on the roadside of Islamabad, Pakistan, Saturday, Feb. 13, 2010. Celebrating Valentine's Day is considered un-Islamic in Pakistan, but many still buy flowers and exchange gifts with others at this time of year. (AP Photo/Muhammed Muheisen) February 13, 2010

A person carries a girl injured by a suicide bombing in Bannu, Pakistan Thursday, Feb. 11, 2010. Two suicide bombers struck outside a police complex in northwest Pakistan on Thursday, killing 15 people. (AP Photo/Muhammad Ijaz) February 12, 2010

Afghan refugee girls gather in a poor neighborhood of Rawalpindi, Pakistan, Saturday, Jan. 16, 2010.
(AP Photo/Muhammed Muheisen) January 17, 2010

Pakistani women wash their laundry in a stream, in Islamabad, Pakistan, Thursday, Dec. 31, 2009. (AP Photo/Muhammed Muheisen) December 31, 2009

Pakistani Christians attend Christmas service at a local church in Pakistan's troubled city of Peshawar on Friday, Dec. 25, 2009. (Mohammad Sajjad) December 26s, 2009