Palestinian farmers harvest wheat during the annual harvest season near the border between Israel and Gaza in Rafah, southern Gaza Strip, April 29, 2014. Palestinians begin harvesting wheat at the beginning of the season for export. Palestinian farmers are concerned about exporting products outside the Gaza Strip due to repeated closure of border crossings. Photo by Abed Rahim Khatib/Flash90

Palestinian farmers harvest wheat during the annual harvest season near the border between Israel and Gaza in Rafah, southern Gaza Strip, April 29, 2014. Palestinians begin harvesting wheat at the beginning of the season for export. Palestinian farmers are concerned about exporting products outside the Gaza Strip due to repeated closure of border crossings. Photo by Abed Rahim Khatib/Flash90

Palestinian farmers harvest wheat during the annual harvest season near the border between Israel and Gaza in Rafah, southern Gaza Strip, April 29, 2014. Palestinians begin harvesting wheat at the beginning of the season for export. Palestinian farmers are concerned about exporting products outside the Gaza Strip due to repeated closure of border crossings. Photo by Abed Rahim Khatib/Flash90

Palestinian farmers harvest wheat during the annual harvest season near the border between Israel and Gaza in Rafah, southern Gaza Strip, April 29, 2014. Palestinians begin harvesting wheat at the beginning of the season for export. Palestinian farmers are concerned about exporting products outside the Gaza Strip due to repeated closure of border crossings. Photo by Abed Rahim Khatib/Flash90

Palestinians wait to cross into Egypt at the Rafah border crossing between Egypt and the southern Gaza Strip on on April 29, 2014. Egyptian authorities partially reopened Rafah border crossing, Gaza's main window to the world, on Tuesday for two days, Palestinian border officials said. Since the overthrow of Egyptian President Mohamed Mursi in July 2013, the authorities have largely kept the crossing closed, only opening it partially for limited periods of time, on humanitarian grounds. Photo by Abed Rahim Khatib /Flash90

Palestinians wait to cross into Egypt at the Rafah border crossing between Egypt and the southern Gaza Strip on on April 29, 2014. Egyptian authorities partially reopened Rafah border crossing, Gaza's main window to the world, on Tuesday for two days, Palestinian border officials said. Since the overthrow of Egyptian President Mohamed Mursi in July 2013, the authorities have largely kept the crossing closed, only opening it partially for limited periods of time, on humanitarian grounds. Photo by Abed Rahim Khatib /Flash90

Palestinians wait to cross into Egypt at the Rafah border crossing between Egypt and the southern Gaza Strip on on April 29, 2014. Egyptian authorities partially reopened Rafah border crossing, Gaza's main window to the world, on Tuesday for two days, Palestinian border officials said. Since the overthrow of Egyptian President Mohamed Mursi in July 2013, the authorities have largely kept the crossing closed, only opening it partially for limited periods of time, on humanitarian grounds. Photo by Abed Rahim Khatib /Flash90

Palestinian militants from the Popular Front for the Liberation of Palestine (PFLP) stage a parade in Khan Yunis in the southern Gaza Strip on April 29, 2014. Photo by Abed Rahim Khatib /Flash90

Palestinian militants from the Popular Front for the Liberation of Palestine (PFLP) stage a parade in Khan Yunis in the southern Gaza Strip on April 29, 2014. Photo by Abed Rahim Khatib /Flash90

Palestinian militants from the Popular Front for the Liberation of Palestine (PFLP) stage a parade in Khan Yunis in the southern Gaza Strip on April 29, 2014. Photo by Abed Rahim Khatib /Flash90

Minister of Economics Naftali Bennett seen at an inauguration of a new kindergarden, in the neighborhood of "Zayit", in Efrat. April 29, 2014. Photo by Gershon Elinson/FLASH90

Leader of Opposition Isaac Herzog seen during a visit to a Beit Midrash (studying of Torah) for Women in Migdal Oz, together with students as well as heads of the Beit Midrash, Esther Rosenberg and Moshe Moskowitz. April 29, 2014. Photo by Gershon Elinson/FLASH90

Leader of Opposition Isaac Herzog seen during a visit to a Beit Midrash (studying of Torah) for Women in Migdal Oz, together with students as well as heads of the Beit Midrash, Esther Rosenberg and Moshe Moskowitz. April 29, 2014. Photo by Gershon Elinson/FLASH90

Leader of Opposition Isaac Herzog seen looking through holy Jewish books, during a visit to the Har Etzion yeshiva in the West Bank settlement of Alon Shvut. April 29, 2014. Photo by Gershon Elinson/FLASH90

Former prime minister and Jerusalem mayor Ehud Olmert, seen in the courtroom of the District Court in Tel Aviv for the sentencing hearings in the Holyland trial on April 29, 2014. The prosecution asked the court to sentence Olmert to at least 6 years in prison for accepting bribery, and a fine of 1.3 million NIS. Olmert was convicted along with other former senior officials and businessmen in the affair around the development of a massive Jerusalem construction project promoted while Olmert was mayor of Jerusalem more than 10 years ago. Photo by Gideon Markowicz/POOL/Flash90

Former prime minister and Jerusalem mayor Ehud Olmert, seen in the courtroom of the District Court in Tel Aviv for the sentencing hearings in the Holyland trial on April 29, 2014. The prosecution asked the court to sentence Olmert to at least 6 years in prison for accepting bribery, and a fine of 1.3 million NIS. Olmert was convicted along with other former senior officials and businessmen in the affair around the development of a massive Jerusalem construction project promoted while Olmert was mayor of Jerusalem more than 10 years ago. Photo by Gideon Markowicz/POOL/Flash90