Palestinian leader Mahmoud Abbas speaks to press in the Hofburg palace in Vienna, Austria, Tuesday, April 30, 2013. (AP Photo/Ronald Zak)
Palestinian leader Mahmoud Abbas speaks to press in the Hofburg palace in Vienna, Austria, Tuesday, April 30, 2013. (AP Photo/Ronald Zak)
**FILE** President Obama and Palestinian President Mahmoud Abbas speak to reporters during their joint news conference at the Muqata President Compound in the West Bank city of Ramallah on March 21, 2013. (Associated Press)
** FILE ** In this June 28, 2011, file photo, Palestinian Prime Minister Salam Fayyad speaks during an interview with The Associated Press in the West Bank city of Ramallah. Palestinian officials said Thursday, April 11, 2013, that Fayyad offered his resignation to President Mahmoud Abbas as part of an increasingly bitter conflict over authority. (AP Photo/Majdi Mohammed, File)
** FILE ** In this June 28, 2011, file photo, Palestinian Prime Minister Salam Fayyad speaks during an interview with The Associated Press in the West Bank city of Ramallah. Palestinian officials said Thursday, April 11, 2013, that Fayyad offered his resignation to President Mahmoud Abbas as part of an increasingly bitter conflict over authority. (AP Photo/Majdi Mohammed, File)
** FILE ** Former President Jimmy Carter speaks Oct. 22, 2012, in the West Bank city of Ramallah to the media following a meeting with Palestinian President Mahmoud Abbas. (Associated Press)
Palestinian President Mahmoud Abbas, right, meets with U.S. Secretary of State John Kerry in the West Bank city of Ramallah, Sunday, April, 7, 2013. (AP Photo / Mohamed Torokman)
Palestinian President Mahmoud Abbas, right, meets with U.S. Secretary of State John Kerry in the West Bank city of Ramallah, Sunday, April, 7, 2013. (AP Photo / Mohamed Torokman)
**FILE** President Obama and Palestinian President Mahmoud Abbas speak to reporters during their joint news conference at the Muqata President Compound in the West Bank city of Ramallah on March 21, 2013. (Associated Press)
