FILE - In this Aug. 6, 2012 file photo, Mahmoud, a 21-year-old Palestinian resident of Syria, rests in a field hospital after he was found with three gunshot wounds in the town of Anadan on the outskirts of Aleppo, Syria. Mahmoud, who would give only one name, described being the only survivor of a massacre in which he and 10 other men were blindfolded, beaten and sprayed with bullets. Syria's fighting has uprooted more than half of the country's 530,000 Palestinians — descendants of refugees from a Mideast conflict half a century ago — and their situation is becoming increasingly desperate, the head of a U.N. aid agency said Thursday, May 23, 2013. The Palestinians in Syria are particularly vulnerable because of their refugee status, Filippo Grandi, head of the U.N. Relief and Works Agency, told The Associated Press in an interview. (AP Photo/Khalil Hamra, File)

A Sunni gunman fires his machine gun during clashes that erupted between pro and anti-Syrian regime gunmen, in the northern port city of Tripoli, Lebanon, Thursday, May. 23, 2013. Opponents and supporters of Syrian President Bashar Assad traded heavy machine gun fire and mortar shells in the Lebanese port city of Tripoli, leaving five people dead in what was described as some of the heaviest fighting there in years, officials said Thursday. (AP Photo)

U.S. Secretary of State John Kerry, left, meets with Israeli Prime Minster Benjamin Netanyahu in Jerusalem Thursday, May 23, 2013. The United States and Israel are raising hopes for a restart of the Middle East peace process after more than four years of hardly any talks. (AP Photo/Jim Young, Pool)

FILE - In this Wednesday, April 28, 2010 file photo, relatives of the 26 suspected Hezbollah members, accused of plotting attacks on tourists and shipping in the Suez Canal and sending operatives and explosives to Gaza to help militant groups there, waves to prison vehicles carrying them outside Emergency State Security Court in New Cairo, Egypt. It was one of the most perplexing events of Egypt's 2011 revolution: Attacks on prisons that broke out more than 20,000 inmates, among them Hamas and Hezbollah militants and Muslim Brotherhood leaders, including the man who is now the country’s president, Mohammed Morsi. Now a court case is trying to uncover for the first time who was behind the attacks, raising political headaches for Morsi. (AP Photo/Amr Nabil, File)

File - In this April 14, 2011 file photo, a boat is by the jetty of the Capernaum National Park in the Sea of Galilee in northern Israel. The monumental structure, made of boulders and stones with a diameter of 70 meters, was found through a sonar scan at the bottom of the Sea of Galilee in 2003. Now, archaeologists are beginning to put together grant proposals and funding requests in a bid to permit them access to the submerged stones.(AP Photo/Bernat Armangue, File)

This image made from video broadcast on Egyptian State Television shows members of the Egyptian security forces after their release by kidnappers, in Cairo, Egypt, Wednesday, May 22, 2013. Six Egyptian policemen and a border guard kidnapped by suspected militants in the volatile Sinai Peninsula last week were freed by their captors Wednesday after successful mediation, the country's military spokesman said. (AP Photo/Egyptian State Television) EGYPT OUT

In this picture taken on Saturday, May 11, 2013, Iranian President Mahmoud Ahmadinejad, left, and his close ally Esfandiar Rahim Mashaei wave to journalists as they arrive at the election headquarters of the interior ministry for registering Masheaei's candidacy for the upcoming presidential election, in Tehran, Iran. By now, President Mahmoud Ahmadinejad is well accustomed to enduring blows from Iran's ruling clerics as his reputation fell from favored son to political outcast. But their intended parting shot _ barring his chief aide from the presidential race _ may be just the opening act in Ahmadinejad's reinvention as a self-styled opposition force. (AP Photo/Ebrahim Noroozi)

U.S. Secretary of State John Kerry, left, speaks during a joint news conference with his Jordanian counterpart, Nasser Judeh, right, in Amman Wednesday, May 22, 2013. Secretary of State John Kerry says the United States and its Arab and European allies will step up their support for Syria’s opposition to help them “fight for the freedom of their country” if President Bashar Assad’s regime doesn’t engage in peace talks in good faith. (AP Photo/Mohammad Hannon)

U.S. Secretary of State John Kerry, left, speaks during a joint news conference with his Jordanian counterpart, Nasser Judeh, right, in Amman Wednesday, May 22, 2013. Secretary of State John Kerry says the United States and its Arab and European allies will step up their support for Syria’s opposition to help them “fight for the freedom of their country” if President Bashar Assad’s regime doesn’t engage in peace talks in good faith. (AP Photo/Mohammad Hannon)

U.S. Secretary of State John Kerry speaks during a joint news conference with his Jordanian counterpart, Nasser Judeh, not pictured, in Amman Wednesday, May 22, 2013. Secretary of State John Kerry says the United States and its Arab and European allies will step up their support for Syria’s opposition to help them “fight for the freedom of their country” if President Bashar Assad’s regime doesn’t engage in peace talks in good faith. (AP Photo/Mohammad Hannon)

In this picture taken on Saturday, May 11, 2013, Iranian President Mahmoud Ahmadinejad, right, joins hands with his close ally Esfandiar Rahim Mashaei, as he flashes a victory sign, at the start of their press conference, after registering the candidacy of Mashaei for the upcoming presidential election, at the election headquarters of the interior ministry, in Tehran, Iran. By now, President Mahmoud Ahmadinejad is well accustomed to enduring blows from Iran's ruling clerics as his reputation fell from favored son to political outcast. But their intended parting shot _ barring his chief aide from the presidential race _ may be just the opening act in Ahmadinejad's reinvention as a self-styled opposition force. (AP Photo/Ebrahim Noroozi)

This Tuesday, May 21, 2013 citizen journalism image provided by Edlib News Network, ENN, which has been authenticated based on its contents and other AP reporting, shows a Syrian rebel firing locally made shells made from gas cylinders against the Syrian forces, in Idlib province, northern Syria. Syria's main opposition group is urging rebels to come from around the country to reinforce Qusair, a western town under attack by Syrian troops and members of Lebanon's Hezbollah group. (AP Photo/Edlib News Network ENN)