In this Wednesday, June 6, 2012, photo, a Pakistani man cleans the roof of an oil tanker that was used to transport NATO fuel supplies to Afghanistan, and parked with other tankers in a compound in Karachi, Pakistan. (AP Photo/Fareed Khan)
** FILE ** In a Oct. 13, 2011, file photo, a Pakistani artist, left, gives final touches to characters of Pakistani Sesame Street in Lahore, Pakistan. The U.S. Embassy in Pakistan says it terminated funding for a $20 million project to develop a local version of Sesame Street amid reports of corruption. (AP Photo/K.M.Chaudary, file)
** FILE ** In this Thursday, May 10, 2012, photo, Pakistani Allah Rakhi, 51, whose nose was sliced by her husband, adjusts her scarf at her home in Thatha Pira, near Gujranwala, Pakistan. (AP Photo/Muhammed Muheisen)
Asma Iqbal, originally from Pakistan, waits with her daughter Eshal Choubhry, 2, and her sister Sadia Kalsoon to get her picture taken with former Secretary of State Madeleine Albright after becoming a naturalized U.S. citizen Thursday, May 24, 2012 at the Smithsonian Institute's National Museum of American History in Washington, D.C. Iqbal was one of 12 candidates who were issued the oath of citizenship. (Barbara L. Salisbury/The Washington Times)
James Mundia, originally of Kenya, grabs Asma Iqbal, originially from Pakistan, as the two wait in line to receive their certificates of citizenship Thursday, May 24, 2012 at a naturalization ceremony at the Smithsonian Institute's National Museum of American History in Washington, D.C. Twelve candidates from 12 different countries became citizens. (Barbara L. Salisbury/The Washington Times)
From left, President Barack Obama, NATO Secretary General Anders Fogh Rasmussen, Afghan President Hamid Karzai, Azerbaijani President Ilham Aliyev and Pakistani President Asif Ali Zardari talk during a family picture of NATO leaders at the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Philippe Wojazer, Pool)
Pakistanis sit atop idle oil tankers that had been used to transport NATO fuel supplies to Afghanistan, while watching a cricket match (upper right) in Karachi, Pakistan, on Wednesday. A deal is said to be near that would reopen supply lines into Afghanistan that have been closed since November. That may explain an invitation to Pakistani President Asif Ali Zardari (left) to a NATO summit. (Associated Press)
British humanitarian worker Khalil Dale, seen here in an undated family photo issued by the British Red Cross on April 29, 2012, was killed in Pakistan after being kidnapped in January. (Associated Press/Family handout via Red Cross)
**FILE** Greg Mortenson, founder of the Central Asia Institute, a Montana-based organization which builds schools for girls in remote tribal areas of Pakistan and Afghanistan (Associated Press/New Mark Communications via the St. Paul Paul Pioneer Press)
**FILE** Supporters of Pakistan's Muslim League burn a representation of the U.S. flag on May 9, 2011, during an anti-American demonstration in Multan, Pakistan. (Associated Press)