Palestinian children chant slogans during a Fatah demonstration marking Land Day and protesting against Israel's separation barrier, in the West Bank village of Anin near Jenin, Wednesday, March 30, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israel on March 30, 1976 during protests over Israeli confiscations of Arab land. Sign depicts Yasser Arafat and Palestinian President Mahmoud Abbas and marks the years since the movement's founding. (AP Photo/Mohammed Ballas)

Israeli Arab demonstrators wave Palestinian flags during a rally marking "Land Day" in the northern town of Arraba March 30, 2011. March 30th marks Land Day, the annual commemoration of protests in 1976 against Israel's appropriation of Arab-owned land in the Galilee. REUTERS/Darren Whiteside (ISRAEL - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

A boy stands under a large Palestinian flag during a rally by Israeli Arab demonstrators marking "Land Day" in the northern town of Arraba March 30, 2011. March 30th marks Land Day, the annual commemoration of protests in 1976 against Israel's appropriation of Arab-owned land in the Galilee. REUTERS/Darren Whiteside (ISRAEL - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

An Israeli Arab woman waves a Palestinian flag during a protest marking Land Day in the village of Arabeh, northern Israel, Wednesday, March 30, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israeli army and police on March 30, 1976 during protests over Israeli confiscations of Arab land. (AP Photo/Ariel Schalit)

An Israeli Arab youth waves a Palestinian flag during a protest marking Land Day in the village of Arabeh, northern Israel, Wednesday, March 30, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israeli army and police on March 30, 1976 during protests over Israeli confiscations of Arab land. (AP Photo/Ariel Schalit)

Palestinian Prime Minister Salam Fayyad, center left, is greeted by an elderly Palestinian woman, as he visits the West Bank village of Yatta near Hebron, to mark Land Day, Wednesday, March 30, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israeli army and police on March 30, 1976 during protests over Israeli confiscations of Arab land. (AP Photo/Nasser Shiyoukhi)

A Bedouin man holds up a Palestinian flag during the annual Land Day rally in the Bedouin village of El Araqib, in the Negev Desert, southern Israel, Wednesday, March 30, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israeli army and police on March 30, 1976 during protests over Israeli confiscations of Arab land. (AP Photo/Tsafrir Abayov)

A protestor hands a Palestinian flag to a girl during a rally marking Land Day in the Bedouin village of al-Arakib, located near the Bedouin town of Rahat in southern Israel March 30, 2011. March 30th marks Land Day, the annual commemoration of protests in 1976 against Israel's appropriation of Arab-owned land in the Galilee. REUTERS/Nir Elias (ISRAEL - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

An Israeli Arab demonstrator waves a Palestinian flag during a rally marking Land Day in the Bedouin village of al-Arakib, located near the Bedouin town of Rahat in southern Israel March 30, 2011. March 30th marks Land Day, the annual commemoration of protests in 1976 against Israel's appropriation of Arab-owned land in the Galilee. REUTERS/Amir Cohen (ISRAEL - Tags: POLITICS ANNIVERSARY CIVIL UNREST IMAGES OF THE DAY)

Visitors arrive at the Field Museum of Natural History in Chicago. A US federal appeals court has sided with Iran in a long-running legal battle over whether Persian artifacts in Chicago museums can be seized as compensation for victims of a terror attack in Israel. (AFP/File/Jeff Haynes)

Resort remains : A Palestinian man stands amid the ruins of the Waha Resort in Beit Lahia in the northern Gaza Strip. (AFP/Thomas Coex)

Palestinian children gather bullet casings after early morning clashes in the Palestinian refugee camp of Ein el-Hilweh near the southern port city of Sidon, Lebanon, Thursday, March 31, 2011. Lebanese and Palestinian officials say clashes between members of Palestinian President Mahmoud Abbas's Fatah group and hardline Muslim militants led by cleric Osama Chehabi occurred in Ein el-Hilweh Thursday and have wounded five people in Lebanon's largest refugee camp. (AP Photo/Mohammed Zaatari)

A Left-wing activist holds a Palestinian national flag during a weekly protest to show solidarity with Palestinians against a Jewish settlement in the Sheikh Jarrah neighbourhood in East Jerusalem April 1, 2011. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST)

An Israeli Arab holds a Palestinians flag during a rally to mark Land Day in Jaffa, a mixed Arab Jewish neighborhood in Tel Aviv, Israel, Saturday, April 2, 2011. Land Day commemorates the killing of six Arab citizens of Israel by the Israeli army and police on March 30, 1976, during protests over Israeli confiscations of Arab land. (AP Photo/Ariel Schalit)

FILE - In this June 3, 2009, file photo, UN investigator Richard Goldstone visits the destroyed house where members of the Samouni family were killed in an artillery strike during Israel's offensive in January 2009 in Gaza City. Goldstone, the head of a U.N.-appointed expert panel that investigated the Gaza war between Israel and Hamas in the winter of 2008-2009 said in a newspaper article published Friday April 1, 2011 by the Washington Post that new accounts by Israel's military indicate that it did not deliberately target civilians. (AP Photo/Ashraf Amra, File)

Cindy Corrie, right, and Craig Corrie, left, the parents of Rachel Corrie, a pro-Palestinian activist who was crushed to death by an Israeli bulldozer in Gaza in 2003, sit together with their daughter Sarah at the District Court in Haifa, Sunday, April 3, 2011. An Israeli commander testifying in a civil lawsuit over the death of the American activist during a protest in the Gaza Strip said the young woman and other activists ignored repeated warnings to move before she was crushed by an armored bulldozer eight years ago. (AP Photo/Oded Balilty)

In this photo taken Wednesday, March 30, 2011 Christian pilgrims visit the Church of the Holy Sepulcher, traditionally believed to be the site of the crucifixion, in Jerusalem's Old City. Israel's vital tourism industry has been surprisingly resilient in the face of regional turmoil that has dried up visits to neighboring Arab countries, tourism officials say. In contrast to Egypt and Jordan, the number of tourists visiting the Jewish state appears to be holding steady, according to tourism experts. (AP Photo/Bernat Armangue)

In this photo taken Wednesday, March 30, 2011 religious items for sale are displayed in a window shop while tourists are reflected on the glass in Jerusalem's Old City in Jerusalem's Old City. Israel's vital tourism industry has been surprisingly resilient in the face of regional turmoil that has dried up visits to neighboring Arab countries, tourism officials say. In contrast to Egypt and Jordan, the number of tourists visiting the Jewish state appears to be holding steady, according to tourism experts. (AP Photo/Bernat Armangue)

Bank of Israel Governor Stanley Fischer (L) hands a report to Finance Minister Yuval Steinitz during a photo opportunity at the Finance Ministry in Jerusalem March 30, 2011. The Bank of Israel on Wednesday raised its forecast for Israel's economic growth to 4.5 percent in 2011 from a prior estimate of 3.8 percent after the economy grew faster than expected last year. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS BUSINESS)

Palestinians gather outside the Freedom theatre headed by Juliano Mer Khamis, who was shot dead in near the West Bank city of Jenin, April 4, 2011. A masked gunman on Monday shot dead well-known Israeli actor and director Juliano Mer Khamis, who worked in the occupied West Bank town of Jenin, a Palestinian security source said. Khamis, 52, was killed in his car in Jenin's refugee camp in the northern West Bank, the source said, adding that the motive was not immediately clear. REUTERS/Abed Omar Qusini (WEST BANK - Tags: CIVIL UNREST CRIME LAW)

New housing units in the Israeli settlement of Har Gilo near the West Bank town of Bethlehem in November 2010. Jerusalem city council has approved the construction of 942 new homes in Gilo, a settlement neighbourhood in the city's mostly Arab eastern sector. (AFP/File/Hazem Bader)

In this image made available Thursday, March 31, 2011, by the Van Abbe Museum in Eindhoven, Holland, Pablo Picasso's painting Buste de Femme, 1943 is seen. Palestinian and Dutch curators are scrambling to bring the 7 million dollar painting by Picasso to the West Bank, a volatile region where it will travel through Israeli checkpoints before landing at an art academy without the proper facilities to house it. Organizers hope it will be on display in Ramallah by early summer, but aren't making any grand announcements until all details are ironed out. (AP Photo/Peter Cox, Van Abbe Museum, HO) NO SALES