Palestinians gather around a wounded militant at the scene of an Israeli air strike in the southern Gaza Strip Palestinians gather around a wounded militant at the scene of an Israeli air strike in Khan Younis in the southern Gaza Strip, March 12, 2012. A general view shows the destruction after an Israeli air strike on a building in the northern Gaza Strip refugee camp of Jabalia on March 12, 2012. A wounded Palestinian youth cries as he lies in a hospital in Gaza City after an Israeli air strike on a building in the northern Gaza Strip refugee camp ofJabalia on March 12, 2012. Palestinian male relatives grieve over the body of Nayef Qarmut, a teenager killed on his way to school in an Israeli military drone strike, as he is prepared for burial at the morgue in Beit Lahiya on March 12, 2012, in the northern Gaza Strip. A Palestinian relative grieves over the body of Nayef Qarmut, a teenager killed in an Israeli military drone strike while on his way to school, in Beit Lahiya on March 12, 2012. Palestinian emergency services workers walk through the rubble of a building in the northern Gaza Strip refugee camp of Jabalia March 12, 2012. Palestinians carry the body of Islamic Jihad militant Hamed Abu Metlak during his funeral in Khan Younis in the southern Gaza Strip, March 12, 2012. An Israeli missile is launched from the Iron Dome missile system in the southern Israeli city of Beer Sheva to intercept a rocket launched from Gaza, March 12, 2012. Palestinians carry the body of 12-year-old boy Ayoub Assaleya during his funeral in Jabalia in the northern Gaza Strip March 11, 2012. An Israeli boy looks for steel ball bearings in a wall of a school in the southern city of Beer Sheva, after it was damaged by a rocket fired by Palestinian militants from Gaza, March 11, 2012. Rocket fire has prompted widespread school closures in southern Israel. Security personnel stand near a car damaged by a rocket fired by Palestinian militants in Gaza, in the southern city of Ashdod, March 12, 2012. Relatives of 12-year-old Ayoub Asalya view his body in the morgue of Kamal Edwan hospital in Beit Lahia in the northern Gaza Strip, on March 11, 2012. Palestinian female relatives of Ayoub Asalya, grieve during his funeral in Jabalia refugee camp in the northern Gaza Strip, on March 11, 2012, after he was killed in an Israeli air raid. An Israeli F-16 jet fighter flies over a battery of interceptors in Ashdod, that form part of Israel's "Iron Dome" anti-missile system, as sirens sound to warn of incoming rockets from Gaza, March 11, 2012. Israeli youths look out as they take cover in a concrete shelter in Nitzan, south of the coastal city of Ashdod on March 11, 2012, during a rocket attack from the nearby Gaza Strip. A Palestinian man rushes to the scene moments after an Israeli airstrike on Rafah, in the southern Gaza Strip, on March 10, 2012. Palestinians carry a man wounded after Israeli soldiers opened fire on mourners who werethrowing stones on March 10, 2012, during the funeral of two men killed in Israeli air strikes on Gaza City. Palestinian mourners carry the body of an Islamic Jihad militant, who was killed in Israeli air strikes, during a mass funeral in Al-Omari mosque in Gaza City on March 10, 2012. Israeli air strikes on Gaza killed 14 Palestinians, including a militant group chief, medics said on March 10, in the deadliest 24 hours in the border ... area in more than three years. An Israeli army sapper examines the remains of a mortar shell fired by Palestinian militants from the Gaza Strip that landed in a kibbutz on the Israel-Gaza border, March 10, 2012. A Palestinian fires in the air during the funeral of Islamic Jihad militants in Gaza City, March 10, 2012. A Palestinian man is seen through a broken car window as he cleans up at the scene of an explosion in Gaza City, March 9, 2012. Palestinians mourn the death of Islamic Jihad militant Hazem Kerekeaa in the al-Shifa hospital morgue on March 9, 2012.