Israeli president Reuven Rivlin (C) visits at a laboratory of Molecular Genetics, as he tours the Haifa University, on December 20, 2015. Photo by Mark Neyman/GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Palestinian kids play in the sand on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian kids ride a carriage on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian fishermen fish on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian fishermen fish on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian fishermen fish on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

A Palestinian fisherman sits on a chair in the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian fisherman preppers his fishing tools on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Palestinian fishermen sits next to a bonfire on the shore of the Mediterranean Sea near the border in the northern Gaza Strip on December 18, 2015. Photo by Emad Nassar/Flash90

Leader of the "Yesh Atid" political party Yair Lapid holds a press conference at Beit Sokolov in Tel Aviv, on December 20, 2015. Lapid and 600 IDF reservists join forces in fight against the NGO 'Breaking the Silence'. Photo by FLASH90

Leader of the "Yesh Atid" political party Yair Lapid holds a press conference at Beit Sokolov in Tel Aviv, on December 20, 2015. Lapid and 600 IDF reservists join forces in fight against the NGO 'Breaking the Silence'. Photo by FLASH90

Leader of the "Yesh Atid" political party Yair Lapid holds a press conference at Beit Sokolov in Tel Aviv, on December 20, 2015. Lapid and 600 IDF reservists join forces in fight against the NGO 'Breaking the Silence'. Photo by FLASH90

Police arrest a right-wing Jewish activist protesting outside a court hearing in Petach Tikva, on the matter of one of the Jewish youth arrested for involvement in an arson attack in the West Bank village of Duma, earlier this summer, where three members of the Dawabshe family were killed. December 20, 2015. Photo by Flash90

Right-wing Jewish activists seen outside a court hearing in Petach Tikva, on the matter of one of the Jewish youth arrested for involvement in an arson attack in the West Bank village of Duma, earlier this summer, where three members of the Dawabshe family were killed. December 20, 2015. Photo by Flash90

Right-wing Jewish activists seen outside a court hearing in Petach Tikva, on the matter of one of the Jewish youth arrested for involvement in an arson attack in the West Bank village of Duma, earlier this summer, where three members of the Dawabshe family were killed. December 20, 2015. Photo by Flash90

Mayor of the southern Israeli town of Sderot, Alon Davidi (R), and mayor of Gush Etzion Regional Council Davidi Perl pose for a picture with an Israeli soldier patrolling in the Gueh Etzion region. Davidi and Perl came to show their support with the residents of the Gush Etzion area, following the recent terror attacks in the region. December 20, 2015. Photo by Gershon Elinson/FLASH90

Mayor of the southern Israeli town of Sderot, Alon Davidi (2L), and mayor of Gush Etzion Regional Council Davidi Perl (C) pose for a picture with an Israeli soldier patrolling in the Gueh Etzion region. Davidi and Perl came to show their support with the residents of the Gush Etzion area, following the recent terror attacks in the region. December 20, 2015. Photo by Gershon Elinson/FLASH90