A Palestinian man carries a child on his shoulders as Palestinian celebrate the planned signing of a reconciliation agreement between Fatah and Hamas, in Gaza City, Wednesday, May 4, 2011. International mediators should drop their demand that the Gaza Strip's Hamas rulers recognize Israel, an aide to Palestinian President Mahmoud Abbas said Wednesday, just hours before his Western-backed government was to sign a reconciliation deal with Hamas. The accord, to be inked in Cairo, would end a four-year rift between the bitter rivals and pave the way for a joint caretaker government ahead of national elections next year. Arabic on headband reads 'Enough'/(AP Photo/Hatem Moussa)

A Palestinian is reflected in a motorcycle wing mirror as he celebrates the reconciliation agreement between the rival Palestinian factions during a rally in Gaza City May 4, 2011. Palestinian President Mahmoud Abbas, who heads Fatah, and Islamist group Hamas leader Khaled Meshaal were in Cairo on Wednesday to endorse a deal to end a four-year rift but a last minute hitch cast doubt on the durability of the accord. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS TRANSPORT)

Palestinians stand under a flag as they celebrate the reconciliation agreement between rival Palestinian factions Fatah and Hamas during a rally in Gaza City May 4, 2011. Palestinian President Mahmoud Abbas, who heads Fatah, and Islamist group Hamas leader Khaled Meshaal were in Cairo on Wednesday to endorse a deal to end a four-year rift but a last minute hitch cast doubt on the durability of the accord. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS)

Palestinians celebrate the reconciliation agreement between rival Palestinian factions Fatah and Hamas during a rally in Gaza City May 4, 2011. Palestinian President Mahmoud Abbas, who heads Fatah, and Islamist group Hamas leader Khaled Meshaal were in Cairo on Wednesday to endorse a deal to end a four-year rift but a last minute hitch cast doubt on the durability of the accord. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS)

Classical musician Daniel Barenboim conducts with musicians from some of Europe's top orchestras during a concert at al-Madha centre, north of Gaza City May 3, 2011. Barenboim, a supporter of Palestinian rights, broke new ground on Tuesday when he travelled to the Gaza Strip to conduct the concert. REUTERS/Mohammed Abed/Pool (GAZA - Tags: SOCIETY ENTERTAINMENT POLITICS)

Israeli Maestro Daniel Barenboim, right, UN Messenger of Peace, applauds during a concert of the Orchestra for Gaza, a mixed orchestra of European musicians, at the Al Mathaf Cultural House in Gaza City, Tuesday, May, 3, 2011. Barenboim and his orchestra have performed in Gaza in solidarity with its Palestinian residents. Barenboim briefly entered Gaza on Tuesday and conducted two pieces by Mozart before a small audience. (AP Photo/Adel Hana/Pool)

With their Islamic style dresses, Iranian Jewish school girls, react to the camera with joy, as a graffiti depicting Moses with 'The Ten Commandments' is seen on the wall, at the Fakhr-e-Danesh school of Iranian Jewish community, in Tehran, Iran, Tuesday, May 3, 2011. (AP Photo/Vahid Salemi)

Wearing their Islamic style uniforms, Iranian Jewish school girls, react with joy, at the Fakhr-e-Danesh school of Iranian Jewish community, in Tehran, Iran, Tuesday, May 3, 2011. About 20,000 Jews live in Iran which has the biggest Jewish community in the middle east outside Israel, and they have one Jewish representative in the parliament under the constitution. Under the country's strict Islamic regulations, women should cover themselves head to toe, although they are allowed to show their faces, and religious minorities must follow Islamic dress codes such as head scarves for women. (AP Photo/Vahid Salemi)

A view of the US Supreme Court from Capitol Hill in 2010. The US Supreme Court agreed Monday to hear an appeal over whether an American born in Jerusalem can list Israel as his place of birth in his passport. (AFP/Getty Images/File/Brendan Smialowski)

Palestinians take part in a rally marking International Workers' Day, or Labour Day, in the West Bank city of Ramallah May 1, 2011. REUTERS/Abed Omar Qusini (WEST BANK - Tags: POLITICS EMPLOYMENT BUSINESS CIVIL UNREST)

Palestinian Catholic worshipers march past a banner with a portrait of of late Pope John Paul II, during a ceremony to celebrate his Beatification, in the West Bank town of Bethlehem, Sunday, May 1, 2011. Pope Benedict XVI beatified Pope John Paul II before more than a million faithful in St. Peter's Square and surrounding streets at the Vatican Sunday, moving the beloved former pontiff one step closer to possible sainthood.(AP Photo/Nasser Shiyoukhi)

Palestinian Prime Minister Salam Fayyad speaks in front of a statue of Pope John Paul II, unveiled during a ceremony in the West Bank town of Bethlehem May 1, 2011, celebrating the beatification of the late pope. The late Pope John Paul moved a major step closer to sainthood on Sunday at a ceremony that drew about a million and half people, the largest crowd in Rome since his funeral six years ago REUTERS/Mohamad Torokman (WEST BANK - Tags: RELIGION)

A battered teddy bear belonging to Ina Rennert, a 75-year-old Holocaust survivor, is displayed with a picture of her as a child at the Yad Vashem Holocaust History Museum in Jerusalem April 17, 2011. Rennert had handed over to Yad Vashem for safekeeping the toy she says she once clung to as a little girl while hiding from the Nazis in Poland during World War Two. Thousands of aging Israeli survivors have answered a call by Yad Vashem to hand in Holocaust-era keepsakes to preserve their memory for future generations. Israel on Monday marks an annual day of remembrance for Jewish victims of the Nazi genocide. Picture taken April 17, 2011. REUTERS/Ronen Zvulun (JERUSALEM - Tags: CONFLICT ANNIVERSARY)

A Palestinian man kicks a teargas canister fired by Israeli troops, not seen, during clashes between Palestinians and Israeli settlers near the Jewish settlement of Bracha and the nearby West Bank village of Burin, near Nablus, Saturday April 30, 2011 . (AP Photo/Nasser Ishtayeh)