Israeli president Reuven Rivlin and his wife arrive to a memorial ceremony marking 20 years to the assassination of Yitzhak Rabin, in the Knesset, Israeli parliament in Jerusalem. October 26,2015. Israel on Monday marked 20 years since Prime Minister Yitzhak Rabin was assassinated by an Israeli extremist who opposed his concessions for peace with the Palestinians. Photo by Yonatan Sindel/Flash90

Minister of Health Yaakov Litzman sttends the Labor, Welfare, and Health Committee meeting at the Knesset, on October 26, 2015. Photo by Hadas Parush/Flash90

(L-R) SUpreme Court judge Miriam Naor, Israeli Prime Minister Benjamin Netanyahu, president Reuven Rivlin, chairman of the Israeli parliament Yuli Edelstein, Dalia Rabin, duaghter of assasinated Prime Minister Yitzhak Rabin and Rachel, Yitzhak's sister, seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israel's Prime Minister Benjamin Netanyahu seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israel's Prime Minister Benjamin Netanyahu seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Rachel Rabin, sister of late Israeli Prime Minister Yitzhak Rabin seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Dalia Rabin (L), daughter of late Israeli Prime Minister Yitzhak Rabin, Rachel Rabin, sister of Yitzhak Rabin, and Yuval Rabin, son of Yitzhak Rabin, seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israeli president Reuven Rivlin shakes hands with Rachel Rabin, sister of late Israeli Prime Minister Yitzhak Rabin seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Yuval Rabin, son of late Israeli Prime Minister Yitzhak Rabin seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Dalia Rabin daughter of late Israeli Prime Minister Yitzhak Rabin seen at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israel's Prime Minister Benjamin Netanyahu speaks at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israel's Prime Minister Benjamin Netanyahu seen with president of the Supreme Court Miriam Naor at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL

Israeli president Reuven Rivlin speaks at a memorial service marking 20 years since the assasination of late Israeli Prime Minsiter Yitzhak Rabin, held at Mount Herzl cemetery in Jerusalem. October 26, 2015. Photo by Marc Israel Sellem/POOL