Palestinian girls, whose house was destroyed during Israel's 22-day offensive, look out of a tent in Jabalya in the northern Gaza Strip January 29, 2009. (Mohammed Salem/Reuters)

A Palestinian man stands next the debris of the destroyed American International School in Beit Lahiya, northern of Gaza Strip, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

A Palestinian student at the Rimal Prep Girls school in Gaza City holds a 100 shekel banknote distributed by the United Nations, Thursday Jan. 29, 2009. id. (AP Photo/Bernat Armangue) (Ibraheem Abu Mustafa/Reuters)

An elderly Palestinian fisherman sits on the beach in front of a destroyed hotel in Gaza City, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

Members of a Palestinian family keep themselves warm around an open fire in their damaged house in Beit Lahiya Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

A member of the Hamas national security forces stands guard at the destroyed Hamas security main compound in Gaza City January 28, 2009. (Suhaib Salem/Reuters)

Palestinian children who were injured in an Israeli missile strike, lay in hospital bed in Khan Younis, southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba)

An Israeli Cobra army helicopter shoots flares over the Gaza Strip near the Israel-Gaza border. (AFP/David Buimovitch)

Israeli Defense Minister Ehud Barak (left) shakes hand with US peace envoy to the Middle East George Mitchell during their meeting in Jerusalem. (AFP/Pool/Gali Tibbon)

A Palestinian boy carries a mattress after humanitarian organizations handed them out to people who lost their homes in the destroyed part of eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

A Palestinian youth carries a sack of plastic bottles collected from a garbage dump in Gaza City, January 27. The United Nations will launch an appeal for 613 million dollars to help those affected by Israel's 22-day offensive in Gaza, UN chief Ban Ki-Moon said Thursday. (AFP/Olivier Laban-Mattei)

A Palestinian boy carries a mattress after humanitarian organizations handed them out to people who lost their homes in the destroyed part of eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. The United Nations launched an emergency appeal Thursday for $US 613 million to help Palestinians recover from Israel's three weeks of military operations in Gaza. (AP Photo/Anja Niedringhaus)

A Palestinian boy stands next to a pile of mattresses after humanitarian organizations handed them out to people who lost their homes in the destroyed part of eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Palestinian load blankets and mattresses on to a donkey cart after humanitarian organizations handed them out to people who lost their homes in the destroyed part of eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

A Palestinian walks past an unfinished building at a construction site in Khan Younis in the southern Gaza Strip January 29, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA)

Lebanese journalists listen to Hezbollah's leader Sheik Hassan Nasrallaha as he holds a press conference projected on a giant screen, in the southern suburb of Beirut, Lebanon, on Thursday Jan. 29, 2009. (AP Photo/Hussein Malla)

Palestinians gather behind a fence in front a make shift camp to wait for humanitarian organizations to hand out sheets and mattress and to get a place in a tent camp in the destroyed part of eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Palestinians gesture from a damaged house near the border of Gaza and Egypt in the southern Gaza Strip January 28, 2009. (Ibraheem Abu Mustafa/Reuters)

A Palestinian, whose house was destroyed during Israel's 22-day offensive, sits in front of tents in Jabalya in the northern Gaza Strip January 29, 2009. REUTERS/Mohammed Salem (GAZA)

Palestinians sit beside a makeshift shelter near their destroyed house in Jabalya in the northern Gaza Strip January 29, 2009. REUTERS/Mohammed Salem (GAZA)

Palestinian women stand in front of tents near their destroyed house in Jabalya in the northern Gaza Strip January 29, 2009. REUTERS/Mohammed Salem (GAZA)

Palestinians sit beside a makeshift shelter atop their destroyed house in Jabalya in the northern Gaza Strip January 29, 2009. REUTERS/Mohammed Salem (GAZA)

Israel's Foreign Minister and Kadima party leader Tzipi Livni speaks to students in Tel Aviv, Israel, Thursday, Jan. 29, 2009.

Israel's Foreign Minister and Kadima party leader Tzipi Livni speaks to students in Tel Aviv, Israel, Thursday, Jan. 29, 2009.

Palestinian peace negotiator Saeb Erakat(R) welcomes new US envoy for the Middle East George Mitchell in Ramallah, West Bank. Mitchell called for a durable truce in Gaza on Thursday as spiralling violence threatened to shatter ceasefires that ended a devastating war in the Hamas-run enclave. (AFP/Leon Neal)

A Palestinian boy who was injured in an Israeli missile strike is wheeled into hospital in Khan Younis, southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba)

A Palestinian girl who was injured in an Israeli missile strike lays in a hospital bed in Khan Younis, southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba)

A Palestinian boy who was injured in an Israeli missile strike reacts in hospital in Khan Younis, southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba)

A Palestinian girl who was injured in an Israeli missile strike reacts in hospital in Khan Younis, southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba)

A relative of Palestinian farmer Anwar al-Beram cries during his funeral in Khan Younis in the southern Gaza Strip January 27, 2009. (Ibraheem Abu Mustafa/Reuters)

Sobhi al-Shaweesh (C) stands in front of his family farm in the village of Johr al-Deek in the Gaza Strip January 26, 2009. (Mohammed Salem - GAZA/Reuters)

A member of Hamas security forces looks at the remains of spent ammunition and unexploded bombs, fired by Israeli warplanes during Israel's 22-day offensive, in Rafah in the southern Gaza Strip January 26, 2009. (Ibraheem Abu Mustafa/Reuters)

A relative of Palestinian farmer Anwar al-Beram cries during his funeral in Khan Younis in the southern Gaza Strip January 27, 2009. (Ibraheem Abu Mustafa/Reuters

A Palestinian man rests in front of tents in Jabalya in the northern Gaza Strip after his house was destroyed during Israel's 22-day offensive January 28, 2009. (Mohammed Salem/Reuters)

A dog eats meat from a dead horse in Bureij camp in the central Gaza Strip, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

In this photo released by the Palestinian Authority, U.S. Middle East envoy, George Mitchell, left, walks with Palestinian President Mahmoud Abbas, at Abbas' headquarters in the West Bank city of Ramallah, Thursday, Jan. 29, 2009. (AP Photo/ PPO, Omar Rashidi, HO)

The words 'peace' and 'love' appear on a blackboard damaged in an Israeli army strike earlier this month, in Bureij camp in the central Gaza Strip, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

Palestinian students study in a classroom damaged in an Israeli army strike earlier this month, in Bureij camp in the central Gaza Strip, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

A Palestinian inspects the rubble of a metal workshop after an Israeli missile strike east of Rafah, in the southern Gaza Strip, Thursday, Jan. 29, 2009. (AP Photo/Eyad Baba) Photo Tools

A Palestinian student cleans rubble from a classroom at a school damaged in an Israeli army strike earlier this month, in Bureij camp in the central Gaza Strip, Thursday Jan. 29, 2009. (AP Photo/Bernat Armangue)

Israeli workers hang an election campaign billboard of Likud party leader Benjamin Netanyahu in Jerusalem, Thursday, Jan. 29, 2009. (AP Photo/Tara Todras-Whitehill)

Israeli workers hang an election campaign poster for Likud party leader Benjamin Netanyahu in Jerusalem, Thursday, Jan. 29, 2009. (AP Photo/Tara Todras-Whitehill)

A wounded Palestinian girl lies in Nasser hospital after an Israeli air strike in Khan Younis in the southern Gaza Strip January 29, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA)

A keychain hangs on a wall in a Palestinian house in Zeitoun, outside Gaza City, daubed with English and Hebrew graffiti left by the Israeli army when they withdraw from Gaza earlier this month, Thursday, Jan. 29, 2009. . (AP Photo/Anja Niedringhaus)

A Palestinian boy checks a calendar on a wall in his house in Zeitoun, outside Gaza City, daubed with English and Hebrew graffiti left by the Israeli army when they withdraw from Gaza earlier this month, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Palestinians look at a destroyed motorcycle after an Israeli air strike in Khan Younis in the southern Gaza Strip January 29, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA)

Hebrew graffiti is daubed on a wall in a bed room of a partly destroyed house, left by the Israeli army when they withdraw from Gaza earlier this month, in Zeitoun, outside Gaza City, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

A boy looks at a Palestinian boy wounded in an Israeli air strike, at Nassir hospital in Khan Younis in the southern Gaza Strip January 29, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA)

A Palestinian man searches through the rubble of destroyed houses in eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Palestinian school children, one with a bandage on her head, hold hands as they leave school in Gaza City, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Doctors treat a wounded Palestinian boy after an Israeli air strike in Khan Younis in the southern Gaza Strip January 29, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA)

Palestinian boys play with a phone they found in the debris of a house in eastern Jebaliya, northern Gaza strip, Thursday, Jan. 29, 2009. (AP Photo/Anja Niedringhaus)

Israelis walk next to an election campaign poster for Likud party leader Benjamin Netanyahu in Tel Aviv, Israel, Thursday, Jan. 29, 2009. (AP Photo/Ariel Schalit)

A worker hangs an elections campaign poster carrying a portrait of Israel's Foreign Minister and Kadima party leader Tzipi Livni in Tel Aviv, Israel, Thursday, Jan. 29, 2009. (AP Photo/Ariel Schalit)

Palestinian Abdullah Siam, 6, center, who came from the Gaza Strip on Tuesday, is accompanied by his mother Houda, right, during an examination by Dr. Lior Sasson, left, head of cardiothoracic surgery at the Wolfson Hospital in the Israeli city of Holon, Wednesday, Jan. 28, 2009.

Palestinian Abdullah Siam, 6, right, who came from the Gaza Strip on Tuesday sits with his mother Houda, left, at the Wolfson Hospital in the Israeli city of Holon, Wednesday, Jan. 28, 2009. (AP Photo/Tara Todras-Whitehill)

Israeli Foreign Minister Tzipi Livni is seen prior to her meeting with U.S. Middle East envoy George Mitchell, not seen, at the Foreign Ministry in Jerusalem, Wednesday, Jan. 28, 2009. (AP Photo/Sebastian Scheiner)

Palestinians wait for food distribution in front of a makeshift camp next to their destroyed houses in eastern Jebaliya, northern Gaza strip, Wednesday, Jan. 28, 2009 (AP Photo / Anja Niedringhaus)

Palestinian women make their way through the rubble of destroyed houses to get to a make shift camp distributing food in eastern Jebaliya, northern Gaza strip, Wednesday, Jan. 28, 2009. (AP Photo/Anja Niedringhaus)

Palestinians wait in front of a fence for food distribution near to the rubble of their destroyed houses in eastern Jebaliya, northern Gaza strip, Wednesday, Jan. 28, 2009. (AP Photo/Anja Niedringhaus)

A Palestinian family sit next to their destroyed home in the area of east Jebaliya, in the northern Gaza Strip, Wednesday Jan. 28, 2009. (AP Photo/Bernat Armangue)

A Palestinian child leads his horse as they pass destroyed homes in the area of east Jebaliya, in the northern Gaza Strip, that was devastated in the last Israeli military offensive, Wednesday Jan. 28, 2009. (AP Photo/Bernat Armangue)

People protest against a planned neo-Nazi solemn vigil in Berlin January 28, 2009. Words read: "Anti-Semitism is not solidarity to Palestine. Nazis piss off". REUTERS/Hannibal Hanschke (GERMANY