A Palestinian protester stands in the middle of tear gas fired by Israeli troops, not seen, during the weekly demonstration against Israel's separation barrier in the West Bank village of Bilin, near Ramallah, Friday, April 15, 2011 (AP Photo/Tara Todras-Whitehill)

Jewish immigrants from Ethiopia attend a demonstration of a ceremonial Passover holiday dinner known as a "seder" at an immigrant's centre in Mevasseret Zion, near Jerusalem April 14, 2011. This year will be the first "seder" the immigrants will be celebrating in Israel, which begins this Monday evening. Passover commemorates the flight of Jews from ancient Egypt as described in Exodus. REUTERS/Ronen Zvulun (ISRAEL - Tags: RELIGION SOCIETY)

An ultra-Orthodox woman works at Matrix Global, a hi-tech company, in the West Bank Jewish settlement of Modiin Illit April 3, 2011. Ultra-Orthodox or "Haredi" women are exempt from the demands of religious studies imposed on men and the Bank of Israel says the past decade has seen "a significant increase" in ultra-Orthodox women's employment rate, now almost at 60 percent. To match Feature ISRAEL-ULTRAORTHODOX/ECONOMY Picture taken April 3, 2011 REUTERS/Darren Whiteside (WEST BANK - Tags: RELIGION BUSINESS)

Ultra-Orthodox Jewish youths study religious texts at a synagogue in Jerusalem April 7, 2011. Ultra-Orthodox Jews, or "Haredim", are a devout tight-knit community who make up 8-10 percent of Israel's 7.7 million population, with eight children per family on average. Many are supported by the state and live well below the poverty line. A Bank of Israel report in March said about 60 percent of Haredi men don't work. To match Feature ISRAEL-ULTRAORTHODOX/ECONOMY Picture taken April 7, 2011. REUTERS/Baz Ratner (JERUSALEM - Tags: RELIGION BUSINESS)

A view of the Sea of Galilee along the Gospel Trail in northern Israel, Thursday, April 14, 2011. For centuries, Christian pilgrims have flocked to Jerusalem to follow Jesus' last footsteps as he bore his cross on the way to his crucifixion. Now, Israel hopes to attract more Christian visitors with a new pilgrimage route in the Galilee — tracing the path of Jesus at the prime of his life and ministry. (AP Photo/Bernat Armangue)

Stones mark the trail on Mount Precipice, the site where according to tradition Jesus was banished from Nazareth and the starting point of of the Gospel Trail in northern Israel, Thursday, April 14, 2011. For centuries, Christian pilgrims have flocked to Jerusalem to follow Jesus' last footsteps as he bore his cross on the way to his crucifixion. Now, Israel hopes to attract more Christian visitors with a new pilgrimage route in the Galilee — tracing the path of Jesus at the prime of his life and ministry. (AP Photo/Bernat Armangue)

A boat is by the jetty of the Capernaum National Park in the Sea of Galilee, along the Gospel Trail in northern Israel, Thursday, April 14, 2011. For centuries, Christian pilgrims have flocked to Jerusalem to follow Jesus' last footsteps as he bore his cross on the way to his crucifixion. Now, Israel hopes to attract more Christian visitors with a new pilgrimage route in the Galilee — tracing the path of Jesus at the prime of his life and ministry. (AP Photo/Bernat Armangue)

A woman looks at an artwork of Houssam Bokeili's exhibition titled "A bus and its replicas" at a gallery in Beirut April 13, 2011. The bus referred to was carrying Palestinians when it came under attack by Christian militants in Ain al-Remmaneh, an incident believed to be one of the major events that triggered Lebanon's brutal 15-year civil war. Lebanon marks on April 13 the 36th anniversary of the start of the Lebanese Civil War, which ended in 1990. REUTERS/Cynthia Karam (LEBANON - Tags: SOCIETY POLITICS CIVIL UNREST ANNIVERSARY)

FILE - In this Wednesday, Oct. 29, 2008 file photo, international activist Vittorio Utmpio Arrigoni, from Italy, carries an aid box from the 'Free Gaza' boat after its arrival at the Gaza port, in Gaza city. A pro-Palestinian group said Thursday April 14, 2011 that Arrigoni, 36, has apparently been kidnapped by Islamic militants in Gaza. (AP Photo/Hatem Moussa, Files)

Palestinian militants show their skills during a training session in Gaza City in 2008. A Salafist group of radical Islamists on Thursday kidnapped an Italian activist in Gaza and threatened to kill him, the group and aid workers said(AFP/File/Mohammed Abed)


A protester holds a banner condemning the killing of Italian activist Vittorio Arrigoni in Gaza during a weekly protest to show solidarity with Palestinians against a Jewish settlement in the Sheikh Jarrah neighborhood in East Jerusalem April 15, 2011 REUTERS/Nir Elias (JERUSALEM - Tags: POLITICS CIVIL UNREST)

File picture shows an embroidered scarf bearing the name of South African judge Richard Goldstone at a Palestinian souvenir shop in Gaza City. The US Senate asked the United Nations to rescind a report on the Gaza War after its lead author, Goldstone, said he was wrong to conclude Israel targeted civilians during the 2008-2009 offensive. (AFP/File/Marco Longari)

A demonstrator runs away from tear gas fired by Israeli soldiers during clashes in the West Bank village of Nabi Saleh near Ramallah April 15, 2011 REUTERS/Mohamad Torokman (WEST BANK - Tags: POLITICS CIVIL UNREST)

A woman holds a banner with a picture of Italian activist Vittorio Arrigoni during a protest against the killing of Arrigoni, in the West Bank city of Ramallah, Friday, April 15, 2011. The body of Arrigoni was found hanged in a Gaza apartment just hours after he was abducted by an al-Qaida-inspired group, Hamas said early Friday, in the first kidnapping of a foreigner since the militant Hamas overran the coastal strip nearly four years ago. (AP Photo/Majdi Mohammed)

Italian peace activists raise a banner reading: 'Let's be human' as they stage a protest at the Duomo gothic cathedral square in Milan, Italy, Friday, April 15, 2011, against the killing of Italian pro-Palestinian activist Vittorio Arrigoni who was found hanged in a Gaza apartment just hours after he was abducted by an al-Qaida-inspired group. (AP Photo/Luca Bruno)

A Palestinian woman and her son hold a banner during a protest against the killing of Italian activist Vittorio Arrigoni in Gaza City, Friday, April 15, 2011. The body of Arrigoni was found hanged in a Gaza apartment just hours after he was abducted by an al-Qaida-inspired group, Hamas said early Friday, in the first kidnapping of a foreigner since the militant Hamas overran the coastal strip nearly four years ago (AP Photo/Adel Hana)

Palestinians light candles in front of a symbolic coffin during a protest against the killing of Italian activist Vittorio Arrigoni in Gaza City, Friday, April 15, 2011. The body of Arrigoni was found hanged in a Gaza apartment just hours after he was abducted by an al-Qaida-inspired group, Hamas said early Friday, in the first kidnapping of a foreigner since the militant Hamas overran the coastal strip nearly four years ago. Arabic text inside the flowers wreath reads ' The popular youth activity send our condolences and honor to the Italian and Palestinian peoples for the martyr. the Journalist Vittorio Arrigoni. All of us are Vittorio Arrigoni.'. (AP Photo/Adel Hana)

Palestinians sit in a mourning tent for Vittorio Arrigoni in Gaza City April 16, 2011. Hamas found the body on Friday of the pro-Palestinian Italian activist who was killed by al Qaeda sympathisers in the Gaza Strip, raising questions about Hamas's control over the beleaguered enclave. Two men were arrested and others were being sought for the abduction and killing of Arrigoni, 36, who was found strangled in an abandoned house on Friday, Hamas officials said. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS CIVIL UNREST)

A Libyan holds the country's old flag, which has been adopted by the rebels, and a banner which reads in French:" No Qaeda, No Hezbollah, Long live Libya.." during the Friday noon prayer in Benghazi. Fighting raged in the long-besieged rebel-held Libyan city of Misrata where a human rights group charged the Libyan army was using banned cluster munitions (AFP/Marwan Naamani)

Palestinian women hold a banner with the picture of Italian activist Vittorio Arrigoni during a protest in the West Bank city of Nablus, Saturday, April 16, 2011. (AP Photo/Nasser Ishtayeh)

Palestinian Prime Minister Salam Fayyad (L) and European High Representative for Foreign Affairs and Security Policy Catherine Ashton address a joint news conference after the annual spring meeting of the donor coordination group for the Palestine Territories at the EU Commission headquarters in Brussels April 13, 2011. Fayyad will brief Western representatives in Brussels on Wednesday on his bid for nearly $5 billion in investment to launch a Palestinian state. REUTERS/Thierry Roge (BELGIUM - Tags: POLITICS BUSINESS)