** FILE ** Then-Yemeni President Ali Abdullah Saleh speaks to state media reporters at the Presidential Palace in Sanaa, Yemen, on Sunday, Jan. 22, 2012. (AP Photo/Office of the Yemeni Presidency)
** FILE ** Then-Yemeni President Ali Abdullah Saleh speaks to state media reporters at the Presidential Palace in Sanaa, Yemen, on Sunday, Jan. 22, 2012. (AP Photo/Office of the Yemeni Presidency)
Greek opposition leader Antonis Samaras attends a meeting with Greek President Karolos Papoulias and Prime Minister George Papandreou at the Presidential Palace in Athens on Sunday, Nov. 6, 2011. (AP Photo/Kostas Tsironis)
Greek Prime Minister George Papandreou waves to journalists as he leaves the Presidential Palace in Athens on Sunday, Nov. 6, 2011, after a meeting with Greek President Karolos Papoulias and opposition leader Antonis Samaras. (AP Photo/Kostas Tsironis)
U.S. Secretary of State Hillary Rodham Clinton meets with Afghan President Hamid Karzai at the Presidential Palace in Kabul, Afghanistan, on Thursday, Oct. 20, 2011. (AP Photo/Kevin Lamarque, Pool)
Afghan President Hamid Karzai (left) prays during a memorial service for former Afghan President Burhanuddin Rabbani at the mosque of the Presidential Palace in Kabul, Afghanistan, on Saturday, Sept. 24, 2011. (AP Photo/Kamran Jebreili)
Afghan President Hamid Karzai gestures during a press conference at the Presidential Palace in Kabul, Afghanistan, on Tuesday, May 31, 2011. Angered by civilian casualties, Mr. Karzai said he no longer will allow NATO airstrikes on houses. (AP Photo/Musadeq Sadeq)
The President of the United States Barack Obama,left, and Polish President Bronislaw Komorowski take part in an arrival ceremony at the Presidential Palace in Warsaw, Saturday, May 28, 2011. Obama came to Poland for a two day visit. (AP Photo/Czarek Sokolowski)
NATO Secretary-General Anders Fogh Rasmussen (left) and Afghan President Hamid Karzai have a joint press conference at the Presidential Palace in Kabul, Afghanistan, on Tuesday, May 24, 2011. (AP Photo/Mustafa Quraishi)
