Israeli soldiers play the parts of wounded civilians during a drill simulating a toxic spill from an attack on a train in Beersheba, southern Israel, 13 January 2016, as Home Front medical teams, fire fighters and police carry out rescue operations. The large scale drill is the concluding exercise of the Fourth International Conference on Healthcare System Preparedness and Response to Emergencies and Disasters and includes some 200 of the world's experts on health system readiness from around the world. The conference is dealing with all types of medical emergencies from terrorist attacks to natural disasters. (Photo by Jim Hollander/EPA)





A man playing the role of a victim is evacuated by Israeli soldiers from the home front command unit during a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. Israeli army spokesperson said on Wednesday that the drill, held on the last day of the 4th International Conference on Healthcare System Preparedness and Response to Emergencies and Disasters, simulated a chemical attack with mass casualties and their evacuation to a trauma center for decontamination and further treatment. Civilian emergency teams participated in the drill alongside the soldiers. (Photo by Amir Cohen/Reuters)





Israeli soldiers from the home front command unit take part in a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





Israeli soldiers from the home front command unit take part in a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





A man playing the role of a victim is attended by Israeli soldiers from the home front command unit during a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





Israeli soldiers from the home front command unit take part in a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





An Israeli soldier from the home front command unit takes part in a drill simulating a non-conventional attack at the Ben-Gurion University of the Negev in the southern city of Beersheba, Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





An Israeli soldier uses his binoculars as he looks towards the northern part of the Israeli Gaza border in southern Israel January 13, 2016. An Israeli aircraft attacked a group of Palestinians in the Gaza Strip on Wednesday who the military said planned to detonate a bomb at the border with Israel, and a Palestinian militant faction said one of its men was killed. (Photo by Amir Cohen/Reuters)





Israeli soldiers rest during military activity across from the Israeli-Gaza border in southern Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





Israeli soldiers wait in position across from the Israeli-Gaza border in southern Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





An Israeli soldier walks in a field during military activity across from the Israeli-Gaza border in southern Israel January 13, 201. (Photo by Amir Cohen/Reuters)





An Israeli soldier walks in a field during military activity across from the Israeli-Gaza border in southern Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





An Israeli soldier rests during military activity across from the Israeli-Gaza border in southern Israel January 13, 2016. (Photo by Amir Cohen/Reuters)





An Israeli soldier walks next to a tank near the Israeli border with the northern Gaza Strip near the southern Israeli village of Netiv Haasara on January 13, 2016.
An Israeli air raid in the northern Gaza Strip targeting alleged militants killed one Palestinian and wounded three others, the Israeli army and a Palestinian official said. (Photo by Menahem Kahana/AFP Photo)





Palestinian militants take part in the funeral of their comrade Mussa Zeater, who was killed in an attack by an Israeli aircraft, in the northern Gaza Strip January 13, 2016. (Photo by Mohammed Salem/Reuters)





A relative of Palestinian militant Mussa Zeater, who was killed in an attack by an Israeli aircraft, mourns during his funeral in the northern Gaza Strip January 13, 2016. The Israeli aircraft attacked a group of Palestinians in the Gaza Strip on Wednesday who the military said planned to detonate a bomb at the border with Israel, and a Palestinian militant faction said one of its men was killed. (Photo by Mohammed Salem/Reuters)





Palestinian women look through a window as mourners carry the body of Palestinian Srur Abu Srur, who was killed by Israeli army on Tuesday, during his funeral in Aida refugee camp in the West Bank city of Bethlehem January 13, 2016. The Palestinian Health Ministry said Abu Srur, 21, was killed by Israeli army gunfire during a confrontation between troops and protesters in the town of Beit Jalla, near Bethlehem. The military said troops had fired at "rioters who hurled firebombs and rocks at the soldiers". (Photo by Ammar Awad/Reuters)





Palestinian militants take part in the funeral of Srur Abu Srur, who was killed by Israeli army on Tuesday, in Aida refugee camp in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





Relatives of Palestinian Srur Abu Srur, who was killed by Israeli army on Tuesday, mourn during his funeral in Aida refugee camp in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





Palestinian protesters use slingshots to hurl stones towards Israeli troops during clashes in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





A Palestinian protester hurls back a tear gas canister fired by Israeli troops during clashes in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





A Palestinian protester uses a sling to hurl stones towards Israeli troops during clashes in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





Palestinian protesters take cover during clashes with Israeli troops in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





A Palestinian protester uses a slingshot to hurl stones towards Israeli troops during clashes in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)





Palestinian protesters take cover during clashes with Israeli troops in the West Bank city of Bethlehem January 13, 2016. (Photo by Ammar Awad/Reuters)